Note 17. Business Segments and Foreign Operations The Company evaluates the performance of its segments and allocates resources to them based on sales and operating income. The Company is organized on the basis of geographical area into the following three segments: the Americas; EMEA; and Asia-Pacific. Segment data does not include inter-segment revenues. Unallocated corporate expenses are general corporate overhead expenses not directly attributable to the business segments and are reported separate from the Companys identified segments. The corporate overhead costs include expenses for the Companys accounting and finance, information technology, human resources, research and development, quality control and executive management functions, as well as all direct costs associated with public company compliance matters including legal, audit and other professional services costs. Also included in corporate overhead costs for fiscal year 2018 are corporate funded advertising and sales promotion expenses focused on increasing the Companys digital presence and building brand awareness. Unallocated Americas EMEA Asia-Pacific Corporate (1) Total Fiscal Year Ended August 31, 2020 Net sales $ 200,493 $ 156,241 $ 51,764 $ - $ 408,498 Income from operations $ 51,089 $ 37,620 $ 14,982 $ ( 26,471 ) $ 77,220 Depreciation and amortization expense $ 4,361 $ 2,855 $ 307 $ 178 $ 7,701 Interest income $ 15 $ 2 $ 76 $ - $ 93 Interest expense $ 1,867 $ 567 $ 5 $ - $ 2,439 Fiscal Year Ended August 31, 2019 Net sales $ 193,972 $ 160,615 $ 68,763 $ - $ 423,350 Income from operations $ 50,069 $ 37,246 $ 20,813 $ ( 25,746 ) $ 82,382 Depreciation and amortization expense $ 4,532 $ 2,538 $ 282 $ 241 $ 7,593 Interest income $ 29 $ 23 $ 103 $ - $ 155 Interest expense $ 2,156 $ 379 $ 6 $ - $ 2,541 Fiscal Year Ended August 31, 2018 Net sales $ 192,878 $ 150,878 $ 64,762 $ - $ 408,518 Income from operations $ 48,954 $ 36,241 $ 19,098 $ ( 25,689 ) $ 78,604 Depreciation and amortization expense $ 4,142 $ 2,561 $ 313 $ 784 $ 7,800 Interest income $ 13 $ 320 $ 121 $ - $ 454 Interest expense $ 4,209 $ - $ 10 $ - $ 4,219 (1) Unallocated corporate expenses are general corporate overhead expenses not directly attributable to any one of the business segments. These expenses are reported separate from the Companys identified segments and are included in Selling, General and Administrative expenses on the Companys consolidated statements of operations. The Companys Chief Operating Decision Maker does not review assets by segment as part of the financial information provided and therefore, no asset information is provided in the above table. Net sales by product group are as follows (in thousands): Fiscal Year Ended August 31, 2020 2019 2018 Maintenance products $ 369,444 $ 386,644 $ 372,391 Homecare and cleaning products 39,054 36,706 36,127 Total $ 408,498 $ 423,350 $ 408,518  Net sales and long-lived assets by geographic area are as follows (in thousands): Fiscal Year Ended August 31, 2020 2019 2018 Net Sales by Geography: United States $ 164,446 $ 157,904 $ 154,986 International 244,052 265,446 253,532 Total $ 408,498 $ 423,350 $ 408,518 Long-lived Assets by Geography (1) : United States $ 41,206 $ 24,535 $ 21,986 International 19,553 20,541 14,371 Total $ 60,759 $ 45,076 $ 36,357 (1) Includes tangible assets and property and equipment, net, attributed to the geographic location in which such assets are located.