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Financial Statement Schedule I (Details 4) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Condensed Financial Statements |  |  |
Net revenues | $ 3,467,626 | $ 2,960,627 | $ 1,654,356
Cost of revenues | 2,890,856 | 2,379,633 | 1,378,661
Gross profit | 576,770 | 580,994 | 275,695
Operating expenses: |  |  |
Selling expenses | 149,710 | 125,797 | 88,426
General and administrative expenses | 162,633 | 76,826 | 44,768
Research and development expenses | 17,056 | 12,057 | 11,685
Total operating expenses | 329,399 | 214,680 | 144,879
Income from operations | 247,371 | 366,314 | 130,816
Other income (expenses): |  |  |
Interest expense | (54,148) | (48,906) | (46,244)
Interest income | 16,831 | 14,363 | 11,973
Loss on change in fair value of derivatives | (12,196) | 19,656 | 10,764
Foreign exchange gain (loss) | 22,882 | (32,219) | (51,469)
Others | 389 | 1,623 | 428
Other income (expenses), net: | (23,900) | (45,483) | (74,548)
Profit (loss) before income taxes and equity in earnings (loss) of subsidiaries and unconsolidated investees | 223,471 | 320,831 | 56,268
Income tax expense | (49,512) | (77,431) | (7,639)
Equity in loss of unconsolidated investees | 643 | (487) | 3,064
Net income attributable to Canadian Solar Inc. | 171,861 | 239,502 | 31,659
Parent Company |  |  |
Condensed Financial Statements |  |  |
Net revenues | 23,302 | 15,900 | 11,802
Cost of revenues | 15,850 | 4,401 | 5,282
Gross profit | 7,452 | 11,499 | 6,520
Operating expenses: |  |  |
Selling expenses | 3,309 | 4,000 | 3,521
General and administrative expenses | 29,124 | 8,331 | 5,724
Research and development expenses | 450 | 416 | 715
Total operating expenses | 32,883 | 12,747 | 9,960
Income from operations | (25,431) | (1,248) | (3,440)
Other income (expenses): |  |  |
Interest expense | (17,241) | (6,329) |
Interest income | 34,471 | 10,369 | 12,022
Loss on change in fair value of derivatives | (13,571) |  |
Foreign exchange gain (loss) | 1,324 | (5,335) | (8,455)
Others |  | 47 | 427
Other income (expenses), net: | 4,983 | (1,248) | 3,994
Profit (loss) before income taxes and equity in earnings (loss) of subsidiaries and unconsolidated investees | (20,448) | (2,496) | 554
Income tax expense | (1,231) | (1,005) | (1,275)
Equity in earnings of subsidiaries | 193,813 | 243,283 | 35,132
Equity in loss of unconsolidated investees | 273 | 280 | 2,752
Net income attributable to Canadian Solar Inc. | $ 171,861 | $ 239,502 | $ 31,659

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