on a consolidated basis , our gross profit margins increased to 27.3 % in 2015 due primarily to favorable price and material cost savings across all of our segments . these improvements were partially offset by unfavorable foreign exchange rates , continued investment in distribution expansion across all segments , unfavorable mix in all segments , and reduced profitability in our australian wholesale business due to the repeal of the carbon tax . 16 results of operations the following table provides a summary of our financial results , including information presented as a percentage of net sales ( dollars in millions ) : replace_table_token_5_th the following table provides net sales by geographic market ( dollars in millions ) : replace_table_token_6_th year ended december 31 , 2015 compared to year ended december 31 , 2014 - consolidated results net sales net sales increased 3 % in 2015 compared to 2014 , with sales volumes up approximately 6 % and price and mix up approximately 1 % . the increase in volume was driven by our residential heating & cooling , commercial heating & cooling and refrigeration segments . the benefit of price and mix was a combination of price increases across all segments and favorable product mix predominantly in our residential heating & cooling segment . partially offsetting these increases was a 4 % decrease from foreign currency exchange rates . gross profit gross profit margins for 2015 increased 50 basis points ( `` bps `` ) to 27.3 % compared to 26.8 % in 2014. lower material costs increased our profit margin by 200 bps , increased factory productivity increased our profit margin by 20 bps and reduced product warranty costs increased our profit margin by 10 bps . offsetting these increases were decreases of 70 bps from unfavorable mix , 50 bps from unfavorable foreign currency adjustments , 20 bps from lower refrigerant pricing on our australia wholesale business when compared to the prior year , 30 bps for investments in distribution and other growth initiatives , and 10 bps from one-time inventory write down costs . 17 selling , general and administrative expenses sg & a expenses increased by $ 7 million in 2015 compared to 2014. as a percentage of net sales , sg & a expenses decreased 30 bps from 17.0 % to 16.7 % in the same periods . the dollar increase in sg & a expenses was principally due to increased incentive compensation , general wage inflation , and health care costs . losses and other expenses , net losses and other expenses , net for 2015 and 2014 included the following ( in millions ) : replace_table_token_7_th the increase in realized losses on settled futures contracts in 2015 was attributable to decreases in commodity prices relative to our settled futures contract prices . additionally , the change in unrealized losses on unsettled futures contracts was primarily due to lower commodity prices relative to the unsettled futures contract prices . for more information on our derivatives , see note 8 in the notes to the consolidated financial statements . foreign currency exchange losses increased in 2015 primarily due to the canadian dollar exchange rates . the special legal contingency charges primarily increased for our estimate of costs expected to be incurred for an attempted class action lawsuit . the asbestos-related litigation relates to known and estimated future asbestos matters . the environmental liabilities relate to estimated remediation costs for contamination at some of our facilities . the contractor tax payments relate to a charge for underpaid contractor taxes at one of our non-u.s. subsidiaries . refer to note 10 in the notes to the consolidated financial statements for more information on litigation , including the asbestos charges , and the environmental liabilities . restructuring charges restructuring charges were $ 3 million in 2015 compared to $ 2 million in 2014. the charges in 2015 and 2014 charges were primarily for projects to realign resources and enhance distribution capabilities in our refrigeration segment . for more information on our restructuring activities , see note 16 in the notes to the consolidated financial statements . goodwill during the fourth quarter we completed a strategic review of our north american supermarket display cases and systems business . as a result , we performed a quantitative impairment analysis for this business unit using the market approach . based on the results of the quantitative impairment test , we recorded goodwill impairment of $ 5.5 million . no other indicators of goodwill impairment were identified through december 31 , 2015 . also , we did not record any goodwill impairments related to continuing operations in 2014. refer to note 4 in the notes to the consolidated financial statements for more information on goodwill . income from equity method investments investments over which we do not exercise control but have significant influence are accounted for using the equity method of accounting . income from equity method investments decreased to $ 13 million in 2015 compared to $ 14 million in 2014 due to decreases in earnings from our joint ventures . 18 asset impairment during the fourth quarter we completed a strategic review of our north american supermarket display cases and systems business . as a result , we performed an impairment analysis using a market approach and determined that intangible and certain long-lived assets relating to our north american supermarket business were impaired and we recorded a charge of $ 45 million in `` asset impairment `` in the consolidated statement of operations . we did not have any impairments of intangible assets related to continuing operations in 2014. interest expense , net net interest expense of $ 24 million in 2015 increased from $ 17 million in 2014 primarily due to an increase in our average borrowings . story_separator_special_tag the indenture governing the notes contains covenants that , among other things , limit our ability and the ability of the subsidiary guarantors to : create or incur certain liens ; enter into certain sale and leaseback transactions ; enter into certain mergers , consolidations and transfers of substantially all of our assets ; and transfer certain properties . the indenture also contains a cross default provision which is triggered if we default on other debt of at least $ 75 million in principal which is then accelerated , and such acceleration is not rescinded within 30 days of the notice date . as of december 31 , 2015 , we were in compliance with all covenant requirements . delaware law limits the ability to pay dividends to surplus or , if there is no surplus , out of net profits for the fiscal year in which the dividend is declared and or the preceding fiscal year . in addition , stock repurchases can only be made out of surplus . leasing commitments on march 22 , 2013 , we entered into an agreement with a financial institution to renew the lease of our corporate headquarters in richardson , texas for a term of approximately six years through march 1 , 2019 ( the `` lake park renewal `` ) . the agreement contains customary lease covenants and events of default as well as financial covenants consistent with our credit agreement and we were in compliance with those covenants as of december 31 , 2015 . the lease is classified as an operating lease and we realize annualized savings of approximately $ 2 million in net rent costs from this renewal compared to our previous leasing arrangement . in 2008 , we expanded our tifton , georgia manufacturing facility using the proceeds from industrial development bonds ( “ idbs ” ) . we entered into a lease agreement with the owner of the property and the issuer of the idbs , and through our lease payments fund the interest payments to investors in the idbs . we also guaranteed the repayment of the idbs and have oustanding letters of credit totaling $ 14.3 million to fund a potential repurchase of the idbs in the event investors exercised their right to tender the idbs to the trustee . as of december 31 , 2015 and 2014 , we had a long-term capital lease obligation of $ 14.3 million related to these transactions . refer to note 10 in the notes to the consolidated financial statements for more details on our leasing commitments . off balance sheet arrangements in addition to the credit facilities , promissory notes and leasing commitments described above , we also lease real estate and machinery and equipment pursuant to operating leases that are not capitalized on the balance sheet , including high-turnover equipment such as autos and service vehicles and short-lived equipment such as personal computers . rent expense for these leases was $ 54 million , $ 51 million , and $ 54 million in 2015 , 2014 , and 2013 , respectively . refer to notes 10 and 23 of the notes to the consolidated financial statements for more information on our lease commitments and rent expense , respectively . contractual obligations summarized below are our contractual obligations as of december 31 , 2015 and their expected impact on our liquidity and cash flows in future periods ( in millions ) : replace_table_token_17_th ( 1 ) contractual obligations related to capital leases are included as part of long-term debt . ( 2 ) the liability for uncertain tax positions includes interest and penalties . ( 3 ) purchase obligations consist of inventory that is part of our third party logistics programs . the table above does not include pension , post-retirement benefit and warranty liabilities because it is not certain when these liabilities will be funded . for additional information regarding our contractual obligations , see notes 10 and 11 of the notes to 26 the consolidated financial statements . see note 12 of the notes to the consolidated financial statements for more information on our pension and post-retirement benefits obligations . fair value measurements fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date . fair value is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date and requires consideration of our creditworthiness when valuing certain liabilities . our framework for measuring fair value is based on a three-level hierarchy for fair value measurements . the three-level fair value hierarchy for disclosure of fair value measurements is defined as follows : level 1 - quoted prices for identical instruments in active markets at the measurement date . level 2 - quoted prices for similar instruments in active markets ; quoted prices for identical or similar instruments in markets that are not active ; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets at the measurement date and for the anticipated term of the instrument . level 3 - valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable inputs that reflect the reporting entity 's own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances . where available , the fair values were based upon quoted prices in active markets . however , if quoted prices were not available , then the fair values were based upon quoted prices for similar assets or liabilities or independently sourced market parameters , such as credit default swap spreads , yield curves , reported trades , broker/dealer quotes , interest rates and benchmark securities . for assets and liabilities without observable market activity , if any

net cash provided by operating activities - net cash provided by operating activities increased $ 146 million to $ 331 million in 2015 compared to $ 185 million in 2014 . this increase was primarily attributable to a decrease in working capital requirements and lower income tax payments in 2015 due to timing of payments , partially offset by lower net income . the majority of the 23 decrease in working capital in 2015 was related to the 2014 increase in working capital requirement related to inventory to support customers in the minimum-efficiency regulatory transition . net cash used in investing activities - capital expenditures were $ 70 million , $ 88 million and $ 78 million in 2015 , 2014 and 2013 , respectively . capital expenditures in 2015 were primarily related to an expansion of manufacturing capacity in mexico for our residential heating & cooling segment , investments in our north america distribution networks and other investments in systems and software to support the overall enterprise . net cash used in investing activities for 2013 also included $ 9 million in net proceeds from the sale of the service experts business . net cash used in financing activities - net cash used in financing activities increased to $ 249 million in 2015 from $ 90 million in 2014 primarily due to a decrease in net borrowings and more dividend payments , partially offset by decreased share repurchases . net borrowings decreased as we repaid debt in 2015 that was used to support the increased stock repurchases and tax payments in 2014. we also used $ 550 million in 2014 to purchase 5.2 million shares of stock in 2014 and 0.5 million shares of stock in 2015 under our share repurchase plans . debt position the following table details our lines of credit and financing arrangements as of december 31 , 2015 ( in millions ) : replace_table_token_16_th ( 1 ) in november 2015 , we amended the asset securitization program ( `` asp '' ) , extending its term to november 13 , 2017 and maintaining the maximum securitization amount range of $ 180.0 million to $ 220.0 million , depending on the period .


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```net cash provided by operating activities - net cash provided by operating activities increased $ 146 million to $ 331 million in 2015 compared to $ 185 million in 2014 . this increase was primarily attributable to a decrease in working capital requirements and lower income tax payments in 2015 due to timing of payments , partially offset by lower net income . the majority of the 23 decrease in working capital in 2015 was related to the 2014 increase in working capital requirement related to inventory to support customers in the minimum-efficiency regulatory transition . net cash used in investing activities - capital expenditures were $ 70 million , $ 88 million and $ 78 million in 2015 , 2014 and 2013 , respectively . capital expenditures in 2015 were primarily related to an expansion of manufacturing capacity in mexico for our residential heating & cooling segment , investments in our north america distribution networks and other investments in systems and software to support the overall enterprise . net cash used in investing activities for 2013 also included $ 9 million in net proceeds from the sale of the service experts business . net cash used in financing activities - net cash used in financing activities increased to $ 249 million in 2015 from $ 90 million in 2014 primarily due to a decrease in net borrowings and more dividend payments , partially offset by decreased share repurchases . net borrowings decreased as we repaid debt in 2015 that was used to support the increased stock repurchases and tax payments in 2014. we also used $ 550 million in 2014 to purchase 5.2 million shares of stock in 2014 and 0.5 million shares of stock in 2015 under our share repurchase plans . debt position the following table details our lines of credit and financing arrangements as of december 31 , 2015 ( in millions ) : replace_table_token_16_th ( 1 ) in november 2015 , we amended the asset securitization program ( `` asp '' ) , extending its term to november 13 , 2017 and maintaining the maximum securitization amount range of $ 180.0 million to $ 220.0 million , depending on the period .
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 Suspicious Activity Report : on a consolidated basis , our gross profit margins increased to 27.3 % in 2015 due primarily to favorable price and material cost savings across all of our segments . these improvements were partially offset by unfavorable foreign exchange rates , continued investment in distribution expansion across all segments , unfavorable mix in all segments , and reduced profitability in our australian wholesale business due to the repeal of the carbon tax . 16 results of operations the following table provides a summary of our financial results , including information presented as a percentage of net sales ( dollars in millions ) : replace_table_token_5_th the following table provides net sales by geographic market ( dollars in millions ) : replace_table_token_6_th year ended december 31 , 2015 compared to year ended december 31 , 2014 - consolidated results net sales net sales increased 3 % in 2015 compared to 2014 , with sales volumes up approximately 6 % and price and mix up approximately 1 % . the increase in volume was driven by our residential heating & cooling , commercial heating & cooling and refrigeration segments . the benefit of price and mix was a combination of price increases across all segments and favorable product mix predominantly in our residential heating & cooling segment . partially offsetting these increases was a 4 % decrease from foreign currency exchange rates . gross profit gross profit margins for 2015 increased 50 basis points ( `` bps `` ) to 27.3 % compared to 26.8 % in 2014. lower material costs increased our profit margin by 200 bps , increased factory productivity increased our profit margin by 20 bps and reduced product warranty costs increased our profit margin by 10 bps . offsetting these increases were decreases of 70 bps from unfavorable mix , 50 bps from unfavorable foreign currency adjustments , 20 bps from lower refrigerant pricing on our australia wholesale business when compared to the prior year , 30 bps for investments in distribution and other growth initiatives , and 10 bps from one-time inventory write down costs . 17 selling , general and administrative expenses sg & a expenses increased by $ 7 million in 2015 compared to 2014. as a percentage of net sales , sg & a expenses decreased 30 bps from 17.0 % to 16.7 % in the same periods . the dollar increase in sg & a expenses was principally due to increased incentive compensation , general wage inflation , and health care costs . losses and other expenses , net losses and other expenses , net for 2015 and 2014 included the following ( in millions ) : replace_table_token_7_th the increase in realized losses on settled futures contracts in 2015 was attributable to decreases in commodity prices relative to our settled futures contract prices . additionally , the change in unrealized losses on unsettled futures contracts was primarily due to lower commodity prices relative to the unsettled futures contract prices . for more information on our derivatives , see note 8 in the notes to the consolidated financial statements . foreign currency exchange losses increased in 2015 primarily due to the canadian dollar exchange rates . the special legal contingency charges primarily increased for our estimate of costs expected to be incurred for an attempted class action lawsuit . the asbestos-related litigation relates to known and estimated future asbestos matters . the environmental liabilities relate to estimated remediation costs for contamination at some of our facilities . the contractor tax payments relate to a charge for underpaid contractor taxes at one of our non-u.s. subsidiaries . refer to note 10 in the notes to the consolidated financial statements for more information on litigation , including the asbestos charges , and the environmental liabilities . restructuring charges restructuring charges were $ 3 million in 2015 compared to $ 2 million in 2014. the charges in 2015 and 2014 charges were primarily for projects to realign resources and enhance distribution capabilities in our refrigeration segment . for more information on our restructuring activities , see note 16 in the notes to the consolidated financial statements . goodwill during the fourth quarter we completed a strategic review of our north american supermarket display cases and systems business . as a result , we performed a quantitative impairment analysis for this business unit using the market approach . based on the results of the quantitative impairment test , we recorded goodwill impairment of $ 5.5 million . no other indicators of goodwill impairment were identified through december 31 , 2015 . also , we did not record any goodwill impairments related to continuing operations in 2014. refer to note 4 in the notes to the consolidated financial statements for more information on goodwill . income from equity method investments investments over which we do not exercise control but have significant influence are accounted for using the equity method of accounting . income from equity method investments decreased to $ 13 million in 2015 compared to $ 14 million in 2014 due to decreases in earnings from our joint ventures . 18 asset impairment during the fourth quarter we completed a strategic review of our north american supermarket display cases and systems business . as a result , we performed an impairment analysis using a market approach and determined that intangible and certain long-lived assets relating to our north american supermarket business were impaired and we recorded a charge of $ 45 million in `` asset impairment `` in the consolidated statement of operations . we did not have any impairments of intangible assets related to continuing operations in 2014. interest expense , net net interest expense of $ 24 million in 2015 increased from $ 17 million in 2014 primarily due to an increase in our average borrowings . story_separator_special_tag the indenture governing the notes contains covenants that , among other things , limit our ability and the ability of the subsidiary guarantors to : create or incur certain liens ; enter into certain sale and leaseback transactions ; enter into certain mergers , consolidations and transfers of substantially all of our assets ; and transfer certain properties . the indenture also contains a cross default provision which is triggered if we default on other debt of at least $ 75 million in principal which is then accelerated , and such acceleration is not rescinded within 30 days of the notice date . as of december 31 , 2015 , we were in compliance with all covenant requirements . delaware law limits the ability to pay dividends to surplus or , if there is no surplus , out of net profits for the fiscal year in which the dividend is declared and or the preceding fiscal year . in addition , stock repurchases can only be made out of surplus . leasing commitments on march 22 , 2013 , we entered into an agreement with a financial institution to renew the lease of our corporate headquarters in richardson , texas for a term of approximately six years through march 1 , 2019 ( the `` lake park renewal `` ) . the agreement contains customary lease covenants and events of default as well as financial covenants consistent with our credit agreement and we were in compliance with those covenants as of december 31 , 2015 . the lease is classified as an operating lease and we realize annualized savings of approximately $ 2 million in net rent costs from this renewal compared to our previous leasing arrangement . in 2008 , we expanded our tifton , georgia manufacturing facility using the proceeds from industrial development bonds ( “ idbs ” ) . we entered into a lease agreement with the owner of the property and the issuer of the idbs , and through our lease payments fund the interest payments to investors in the idbs . we also guaranteed the repayment of the idbs and have oustanding letters of credit totaling $ 14.3 million to fund a potential repurchase of the idbs in the event investors exercised their right to tender the idbs to the trustee . as of december 31 , 2015 and 2014 , we had a long-term capital lease obligation of $ 14.3 million related to these transactions . refer to note 10 in the notes to the consolidated financial statements for more details on our leasing commitments . off balance sheet arrangements in addition to the credit facilities , promissory notes and leasing commitments described above , we also lease real estate and machinery and equipment pursuant to operating leases that are not capitalized on the balance sheet , including high-turnover equipment such as autos and service vehicles and short-lived equipment such as personal computers . rent expense for these leases was $ 54 million , $ 51 million , and $ 54 million in 2015 , 2014 , and 2013 , respectively . refer to notes 10 and 23 of the notes to the consolidated financial statements for more information on our lease commitments and rent expense , respectively . contractual obligations summarized below are our contractual obligations as of december 31 , 2015 and their expected impact on our liquidity and cash flows in future periods ( in millions ) : replace_table_token_17_th ( 1 ) contractual obligations related to capital leases are included as part of long-term debt . ( 2 ) the liability for uncertain tax positions includes interest and penalties . ( 3 ) purchase obligations consist of inventory that is part of our third party logistics programs . the table above does not include pension , post-retirement benefit and warranty liabilities because it is not certain when these liabilities will be funded . for additional information regarding our contractual obligations , see notes 10 and 11 of the notes to 26 the consolidated financial statements . see note 12 of the notes to the consolidated financial statements for more information on our pension and post-retirement benefits obligations . fair value measurements fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date . fair value is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date and requires consideration of our creditworthiness when valuing certain liabilities . our framework for measuring fair value is based on a three-level hierarchy for fair value measurements . the three-level fair value hierarchy for disclosure of fair value measurements is defined as follows : level 1 - quoted prices for identical instruments in active markets at the measurement date . level 2 - quoted prices for similar instruments in active markets ; quoted prices for identical or similar instruments in markets that are not active ; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets at the measurement date and for the anticipated term of the instrument . level 3 - valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable inputs that reflect the reporting entity 's own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances . where available , the fair values were based upon quoted prices in active markets . however , if quoted prices were not available , then the fair values were based upon quoted prices for similar assets or liabilities or independently sourced market parameters , such as credit default swap spreads , yield curves , reported trades , broker/dealer quotes , interest rates and benchmark securities . for assets and liabilities without observable market activity , if any

