| 10. FINANCE | COSTS, NET |
| 12.31.2017 | 12.31.2016 | 12.31.2015 | ||||||||||
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Exchange rate differences |
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Foreign exchange gains |
120,939,219 | 163,489,521 | 248,889,974 | |||||||||
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Foreign exchange losses |
(433,994,151 | ) | (424,515,292 | ) | (407,739,921 | ) | ||||||
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Total |
(313,054,932 | ) | (261,025,771 | ) | (158,849,947 | ) | ||||||
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Financial income |
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Interest from short-term investments |
80,949,998 | 6,710,642 | 6,965,026 | |||||||||
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Interest from loans to related parties |
3,616,730 | 15,009,696 | 9,587,759 | |||||||||
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Unwinding of discounts on receivables |
19,249,948 | 19,429,424 | 9,600,690 | |||||||||
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|
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Total |
103,816,676 | 41,149,762 | 26,153,475 | |||||||||
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Financial expenses |
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Interest on borrowings |
(518,424,024 | ) | (586,322,379 | ) | (386,386,183 | ) | ||||||
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Interest on borrowings with related parties |
(6,803,091 | ) | (7,269,913 | ) | (7,536,747 | ) | ||||||
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Unwinding of discounts on provisions and liabilities |
(60,763,361 | ) | (79,284,725 | ) | (27,012,250 | ) | ||||||
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Others |
(46,914,229 | ) | (48,534,380 | ) | (37,932,649 | ) | ||||||
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Total |
(632,904,705 | ) | (721,411,397 | ) | (458,867,829 | ) | ||||||
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