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Consolidated Statements of Income - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2017 | Apr. 30, 2016 | Apr. 30, 2015
Income Statement [Abstract] |  |  |
Total revenue | $ 7,506,587 | $ 7,122,086 | $ 7,767,216
Cost of goods sold (exclusive of depreciation and amortization, shown separately below) | 5,825,426 | 5,508,465 | 6,327,431
Gross profit | 1,681,161 | 1,613,621 | 1,439,785
Operating expenses | 1,172,328 | 1,053,805 | 960,424
Depreciation and amortization | 197,629 | 170,937 | 156,111
Interest, net | 41,536 | 40,173 | 41,225
Income before income taxes | 269,668 | 348,706 | 282,025
Federal and state income taxes | 92,183 | 122,724 | 101,397
Net income | $ 177,485 | $ 225,982 | $ 180,628
Net income per common share |  |  |
Basic (in Dollars per share) | $ 4.54 | $ 5.79 | $ 4.66
Diluted (in Dollars per share) | 4.48 | 5.73 | 4.62
Dividends declared (in Dollars per share) | $ 0.96 | $ 0.88 | $ 0.80

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