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EXPENSES BY NATURE (Tables) | 12 Months Ended
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Dec. 31, 2017
EXPENSES BY NATURE |
Schedule of expenses classified by nature |
|  | 2017 |  | 2016 |  | 2015 |
Depreciation and amortization |  | (2,092,551 | ) | (2,535,955 | ) | (2,607,909 | )
Labor expenses |  | (5,514,721 | ) | (6,508,834 | ) | (7,018,129 | )
Raw material and consumption material |  | (23,423,950 | ) | (22,863,693 | ) | (27,126,417 | )
Freight |  | (2,281,773 | ) | (2,279,459 | ) | (2,538,071 | )
Impairment of assets |  | (1,114,807 | ) | (2,917,911 | ) | (4,996,240 | )
Gains and losses on assets held for sale and sales of interest in subsidiaries and associate company |  | (721,682 | ) | (58,223 | ) | — |
Reversal of contingent liabilities, net |  | 929,711 |  | — |  | — |
Other expenses/income, net |  | (1,563,177 | ) | (2,111,181 | ) | (2,485,485 | )
|  | (35,782,950 | ) | (39,275,256 | ) | (46,772,251 | )
Classified as: |  |  |  |  |  |  |
Cost of sales |  | (33,312,995 | ) | (34,187,941 | ) | (39,290,526 | )
Selling expenses |  | (524,965 | ) | (710,766 | ) | (785,002 | )
General and administrative expenses |  | (1,129,943 | ) | (1,528,262 | ) | (1,797,483 | )
Other operating income |  | 260,618 |  | 242,077 |  | 213,431 |
Other operating expenses |  | (168,887 | ) | (114,230 | ) | (116,431 | )
Impairment of assets |  | (1,114,807 | ) | (2,917,911 | ) | (4,996,240 | )
Gains and losses on assets held for sale and sales of interest in subsidiaries and associate company |  | (721,682 | ) | (58,223 | ) | — |
Reversal of contingent liabilities, net |  | 929,711 |  | — |  | — |
|  | (35,782,950 | ) | (39,275,256 | ) | (46,772,251 | )

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