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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 28, 2020 | Mar. 30, 2019
Total revenue | $ 707,059 | $ 604,569
Costs and expenses: |  |
Selling, general and administrative | 129,901 | 122,574
Amortization of intangible assets | 27,879 | 19,411
Operating income | 94,281 | 69,792
Other income (expense): |  |
Interest income | 316 | 179
Interest expense | (15,067) | (9,987)
Other (expense) income, net | (24,071) | 6,306
Income from operations, before income taxes | 55,459 | 66,290
Provision for income taxes | 4,622 | 10,602
Net income | 50,837 | 55,688
Less: Net income attributable to noncontrolling interests | 68 | 555
Net income attributable to common shareholders | $ 50,769 | $ 55,133
Earnings per common share |  |
Basic (in dollars per share) | $ 1.03 | $ 1.14
Diluted (in dollars per share) | $ 1.02 | $ 1.11
Weighted-average number of common shares outstanding: |  |
Basic (in shares) | 49,189 | 48,458
Diluted (in shares) | 49,966 | 49,462
Service |  |
Total revenue | $ 546,592 | $ 450,942
Costs and expenses: |  |
Cost of services provided and products sold (excluding amortization of intangible assets) | 372,824 | 316,800
Product |  |
Total revenue | 160,467 | 153,627
Costs and expenses: |  |
Cost of services provided and products sold (excluding amortization of intangible assets) | $ 82,174 | $ 75,992

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