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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Jan. 02, 2016 | Jan. 03, 2015
CONSOLIDATED STATEMENTS OF OPERATIONS |  |  |
Revenues | $ 324,779 | $ 303,559 | $ 306,371
Costs of services | 227,380 | 207,650 | 206,813
Gross profit | 97,399 | 95,909 | 99,558
Selling, general and administrative expenses | 70,584 | 72,439 | 69,074
Depreciation and amortization | 7,896 | 6,552 | 6,443
GNU goodwill impairment |  | 4,524 |
Income from operations | 18,919 | 12,394 | 24,041
GNU gain on extinguishment of debt |  | 606 |
GNU gain on sale of business assets | 3,836 |  |
Interest expense, net | (469) | (538) | (431)
Other expense, net | (397) | (647) | (295)
Income before provision for income taxes | 21,889 | 11,815 | 23,315
Provision for income taxes | (7,656) | (5,490) | (9,908)
Net income | 14,233 | 6,325 | 13,407
Net (income) loss attributable to noncontrolling interest, net of tax | (1,345) | 1,332 | 231
Net income attributable to CRA International, Inc. | $ 12,888 | $ 7,657 | $ 13,638
Net income per share attributable to CRA International, Inc.: |  |  |
Basic (in dollars per share) | $ 1.50 | $ 0.84 | $ 1.40
Diluted (in dollars per share) | $ 1.49 | $ 0.83 | $ 1.38
Weighted average number of shares outstanding: |  |  |
Basic (in shares) | 8,503 | 9,010 | 9,747
Diluted (in shares) | 8,601 | 9,195 | 9,897

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