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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Net revenues: |  |  |
-Non-related parties | $ 3,413,769 | $ 3,101,113 | $ 3,624,687
-Related parties | 62,726 | 99,470 | 119,825
Total net revenues | 3,476,495 | 3,200,583 | 3,744,512
Cost of revenues: |  |  |
-Non-related parties | 2,756,687 | 2,424,476 | 2,894,611
-Related parties | 29,894 | 57,610 | 74,819
Total cost of revenues | 2,786,581 | 2,482,086 | 2,969,430
Gross profit | 689,914 | 718,497 | 775,082
Operating expenses: |  |  |
Selling and distribution expenses | 224,243 | 180,326 | 165,402
General and administrative expenses | 225,597 | 242,783 | 245,376
Research and development expenses | 45,167 | 47,045 | 44,193
Other operating income, net | (25,523) | (10,536) | (44,546)
Total operating expenses | 469,484 | 459,618 | 410,425
Income from operations | 220,430 | 258,879 | 364,657
Other income (expenses): |  |  |
Interest expense | (71,874) | (81,326) | (106,032)
Interest income | 9,306 | 12,039 | 11,207
Gain (loss) on change in fair value of derivatives, net | 50,001 | (22,218) | (19,230)
Foreign exchange gain (loss) | (64,820) | 10,370 | 6,529
Investment income (loss) | (8,559) | 1,929 | 41,361
Other expenses, net | (85,946) | (79,206) | (66,165)
Income before income taxes and equity in earnings of unconsolidated investees | 134,484 | 179,673 | 298,492
Income tax benefit (expense) | 1,983 | (42,066) | (61,969)
Equity in earnings (loss) of unconsolidated investees | 10,779 | 28,948 | 5,908
Net income | 147,246 | 166,555 | 242,431
Less: net income (loss) attributable to non-controlling interests | 543 | (5,030) | 5,361
Net income attributable to Canadian Solar Inc. | $ 146,703 | $ 171,585 | $ 237,070
Earnings per share - basic | $ 2.46 | $ 2.88 | $ 4.02
Shares used in computation - basic | 59,575,898 | 59,633,855 | 58,914,540
Earnings per share - diluted | $ 2.38 | $ 2.83 | $ 3.88
Shares used in computation - diluted | 62,306,819 | 60,777,696 | 62,291,670

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