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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Revenue: |  |  |  |
Total revenue |  | $ 1,416,868 | $ 2,218,915 | $ 2,636,746
Cost of revenue: |  |  |  |
Cost of revenue |  | 739,574 | 1,032,786 | 1,316,145
Gross profit |  | 677,294 | 1,186,129 | 1,320,601
Operating expenses: |  |  |  |
Marketing |  | 154,534 | 339,355 | 395,737
Selling, general and administrative |  | 603,185 | 806,945 | 870,961
Goodwill impairment |  | 109,486 | 0 | 0
Long-lived asset impairment |  | 22,351 | 0 | 0
Restructuring and related charges |  | 64,836 | 31 | (136)
Total operating expenses |  | 954,392 | 1,146,331 | 1,266,562
Income (loss) from operations |  | (277,098) | 39,798 | 54,039
Other income (expense), net |  | (16,968) | (53,329) | (53,008)
Income (loss) from continuing operations before provision (benefit) for income taxes |  | (294,066) | (13,531) | 1,031
Provision (benefit) for income taxes |  | (7,504) | 761 | (957)
Income (loss) from continuing operations |  | (286,562) | (14,292) | 1,988
Income (loss) from discontinued operations, net of tax |  | 382 | 2,597 | 0
Net income (loss) |  | (286,180) | (11,695) | 1,988
Net (income) loss attributable to noncontrolling interests |  | (1,751) | (10,682) | (13,067)
Net income (loss) attributable to Groupon, Inc. |  | $ (287,931) | $ (22,377) | $ (11,079)
Basic and diluted net income (loss) per share: |  |  |  |
Continuing operations (in usd per share) | [1] | $ (10.08) | $ (0.88) | $ (0.39)
Discontinued operations (in usd per share) | [1] | 0.01 | 0.09 | 0
Basic and diluted net income (loss) per share (in usd per share) | [1] | $ (10.07) | $ (0.79) | $ (0.39)
Weighted average number of shares outstanding: |  |  |  |
Basic (in shares) | [1] | 28,604,115 | 28,370,417 | 28,325,555
Diluted (in shares) | [1] | 28,604,115 | 28,370,417 | 28,325,555
Service |  |  |  |
Revenue: |  |  |  |
Total revenue |  | $ 643,653 | $ 1,126,357 | $ 1,205,487
Cost of revenue: |  |  |  |
Cost of revenue |  | 79,296 | 114,462 | 120,077
Product |  |  |  |
Revenue: |  |  |  |
Total revenue |  | 773,215 | 1,092,558 | 1,431,259
Cost of revenue: |  |  |  |
Cost of revenue |  | $ 660,278 | $ 918,324 | $ 1,196,068
[1] | All share and per share information has been retroactively adjusted to reflect a reverse stock split. See Note 13, Stockholders' Equity for additional information.

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