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Consolidated Statements of Operations - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Consolidated Statements of Operations |  |  |  |
Sales of goods | $ 146,780 | $ 151,906 | $ 269,576 | $ 255,114
Sales of services | 24,639 | 14,926 | 39,750 | 23,132
Total sales | 171,419 | 166,832 | 309,326 | 278,246
Cost of goods sold | 114,793 | 125,419 | 210,987 | 206,571
Cost of services sold | 19,537 | 10,713 | 30,596 | 16,848
Total cost of sales | 134,330 | 136,132 | 241,583 | 223,419
Gross profit | 37,089 | 30,700 | 67,743 | 54,827
Selling and administrative expenses | 24,278 | 19,599 | 46,528 | 37,624
Amortization expense | 3,456 | 1,172 | 5,613 | 2,313
Interest expense | 1,288 | 126 | 1,901 | 249
Interest income | (37) | (147) | (94) | (291)
Equity in loss (income) of nonconsolidated investments | 186 | (142) | 13 | (346)
Other loss (income) | 95 | (138) | (708) | (273)
Total Operating Expenses | 29,266 | 20,470 | 53,253 | 39,276
Income before income taxes | 7,823 | 10,230 | 14,490 | 15,551
Income tax expense | 2,461 | 3,368 | 4,841 | 5,040
Net income | $ 5,362 | $ 6,862 | $ 9,649 | $ 10,511
Basic earnings per common share: |  |  |  |
Basic earnings per common share | $ 0.52 | $ 0.67 | $ 0.94 | $ 1.03
Diluted earnings per common share: |  |  |  |
Diluted earnings per common share | 0.52 | 0.67 | 0.93 | 1.02
Dividends paid per common share | $ 0.04 | $ 0.03 | $ 0.08 | $ 0.06

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