BUSINESS ACQUISITIONS LumaSense Technologies Holdings, Inc. In September 2018, Advanced Energy acquired LumaSense Technologies Holdings, Inc. ("LumaSense"), a privately held company with primary operations in Santa Clara, California, Frankfurt, Germany, and Ballerup, Denmark for a purchase price of $94.9 million in cash. Electrostatic Technology and Product Line In May 2018, Advanced Energy acquired the electrostatic technology and product line from Monroe Electronics, Inc. ("Monroe") a privately held electronics manufacturer in Lyndonville, New York for $3.0 million in cash. Trek Holding Co., LTD I n February 2018, Advanced Energy acquired Trek Holding Co., LTD ("Trek"), a privately held company with operations in Tokyo, Japan and Lockport, New York for $11.7 million in cash. Trek has a 95% ownership interest in its U.S. subsidiary which is also its primary operation. Excelsys Holdings Limited In July 2017, Advanced Energy acquired all of the issued and outstanding shares of capital stock of Excelsys Holdings Limited (Excelsys), an electronics manufacturer in Cork, Ireland for $18.5 million in cash. The components of the fair value of the total consideration transferred for our acquisitions are as follows: 2018 2017 Trek Electrostatic Product Line LumaSense Total Excelsys Cash paid for acquisition $ 11,723 $ 3,000 $ 94,946 $ 109,669 $ 18,512 Cash acquired (5,651 )  (10,262 ) (15,913 ) (1,165 ) Total fair value of consideration transferred $ 6,072 $ 3,000 $ 84,684 $ 93,756 $ 17,347 The following table summarizes estimated fair values of the assets acquired and liabilities assumed from our acquisitions: 2018 2017 Trek Electrostatic Product Line LumaSense Total Excelsys Accounts and other receivable, net $ 2,818 $ 77 $ 7,167 $ 10,062 $ 1,930 Inventories 3,941 292 9,372 13,605 1,048 Property and equipment 594 50 1,353 1,997 256 Goodwill  1,220 48,032 49,252 8,929 Intangible assets 788 1,400 26,000 28,188 7,585 Deferred income tax assets 606  8,116 8,722 35 Other assets 854  5,126 5,980 605 Total assets acquired 9,601 3,039 105,166 117,806 20,388 Accounts payable 747 39 5,734 6,520 1,342 Deferred income tax liabilities   7,984 7,984 946 Other liabilities 2,782  6,764 9,546 753 Total liabilities assumed 3,529 39 20,482 24,050 3,041 Total fair value of net assets acquired $ 6,072 $ 3,000 $ 84,684 $ 93,756 $ 17,347 A summary of the intangible assets acquired, amortization method and estimated useful lives are as follows: 2018 2017 Method and Useful life Trek Electrostatic Product Line LumaSense Excelsys Amortization Method Useful Life Technology $ 671 $ 1,200 $ 20,000 $ 5,808 Straight-line 10 Customer relationships 117 200 6,000 1,595 Straight-line 10 Tradename    182 Straight-line 5 Total $ 788 $ 1,400 $ 26,000 $ 7,585 Goodwill and intangible assets are recorded in the functional currency of the entity and are subject to changes due to translation at each balance sheet date. The goodwill represents expected operating synergies from combining operations with the acquired companies and the estimated value associated with the enhancements to our comprehensive product lines. Advanced Energy is in the process of finalizing the assessment of fair value for the assets acquired and liabilities assumed related to the LumaSense acquisition. Pro forma results for Advanced Energy Inc. giving effect to the LumaSense Technologies Holdings, Inc. and Trek Holding Co., LTD acquisitions The following unaudited pro forma financial information presents the combined results of operations of Advanced Energy Inc., Trek and LumaSense as if the acquisitions had been completed as of the beginning of the prior fiscal year, or January 1, 2017. The unaudited pro forma financial information is presented for informational purposes and is not indicative of the results of operations that would have been achieved if the acquisitions had taken place on January 1, 2017, nor are they indicative of future results. The unaudited pro forma financial information for the year ended December 31, 2018 includes Advanced Energy's results, including the post-acquisition results of Trek, since February 1, 2018, and the pre-acquisition results of Trek for that period, and including the post-acquisition results of LumaSense, since September 1, 2018, and the pre-acquisition results of LumaSense for that period. The unaudited pro forma financial information for the year ended December 31, 2017 combines Advanced Energy's results with the pre-acquisition results of Trek and the pre-acquisition results of LumaSense for that period. The unaudited pro forma results for the years ended : December 31, 2018 December 31, 2017 As reported Pro forma As reported Pro forma Total sales 718,892 758,934 671,012 752,091 Net income attributable to Advanced Energy Industries, Inc. 147,025 148,456 137,861 141,907 Earnings per share: Basic earnings per share $ 3.76 $ 3.80 $ 3.47 $ 3.57 Diluted earnings per share $ 3.74 $ 3.77 $ 3.43 $ 3.53 The unaudited pro forma results for all periods presented include adjustments made to account for certain costs and transactions that would have been incurred had the acquisitions been completed as of January 1, 2017. These adjustments including amortization charges for acquired intangible assets, adjustments for acquisition transaction costs and amortization of purchased gross profit. These adjustments are net of any applicable tax impact and were included to arrive at the pro forma results above. Trek's operating results have been included in the Advanced Energy's operating results for the periods subsequent to the completion of the acquisition on February 1, 2018. Trek contributed total sales of $21.3 million for the year ended December 31, 2018 and a net income of $2.2 million for the year ended December 31, 2018. LumaSenses operating results have been included in the Advanced Energy's operating results for the periods subsequent to the completion of the acquisition on September 1, 2018. LumaSense contributed total sales of $17.4 million for the year ended December 31, 2018 and a net (loss) of $(1.1) million for the year ended December 31, 2018. Advanced Energy incurred transaction-related costs of $2.3 million for the year ended December 31, 2018. These cost include $1.7 million included in "Selling, general and administrative" and $0.6 million included in "Cost of sales" in the Consolidated Statements of Operations. These transaction-related costs consisted of the LumaSense acquisition transaction and integration costs, warranty and indemnity insurance costs and the amortization of purchased gross profit.