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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
CONSOLIDATED STATEMENTS OF OPERATIONS |  |  |
Revenues | $ 370,075 | $ 324,779 | $ 303,559
Costs of services (exclusive of depreciation and amortization) | 258,829 | 227,380 | 207,650
Selling, general and administrative expenses | 86,537 | 70,584 | 72,439
Depreciation and amortization | 8,945 | 7,896 | 6,552
GNU goodwill impairment |  |  | 4,524
Income from operations | 15,764 | 18,919 | 12,394
GNU gain on extinguishment of debt |  |  | 606
GNU gain on sale of business assets | 250 | 3,836 |
Interest expense, net | (484) | (469) | (538)
Other expense, net | (366) | (397) | (647)
Income before provision for income taxes | 15,164 | 21,889 | 11,815
Provision for income taxes | (7,463) | (7,656) | (5,490)
Net income | 7,701 | 14,233 | 6,325
Net (income) loss attributable to noncontrolling interest, net of tax | (77) | (1,345) | 1,332
Net income attributable to CRA International, Inc. | $ 7,624 | $ 12,888 | $ 7,657
Net income per share attributable to CRA International, Inc.: |  |  |
Basic (in dollars per share) | $ 0.91 | $ 1.50 | $ 0.84
Diluted (in dollars per share) | $ 0.89 | $ 1.49 | $ 0.83
Weighted average number of shares outstanding: |  |  |
Basic (in shares) | 8,292 | 8,503 | 9,010
Diluted (in shares) | 8,497 | 8,601 | 9,195

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