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SELLING, GENERAL AND ADMINISTRATIVE EXPENSES (Tables) | 12 Months Ended
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Dec. 31, 2017
Analysis of income and expense [abstract] |
Schedule of selling, general and administrative expense |
| Year ended December 31,
| 2017 |  | 2016 |  | 2015
Services and fees (1) | 86,990 |  |  | 65,965 |  |  | 69,434 |
Labor cost | 229,529 |  |  | 193,118 |  |  | 214,352 |
Depreciation of property, plant and equipment | 12,345 |  |  | 13,589 |  |  | 13,761 |
Amortization of intangible assets | 78,264 |  |  | 38,427 |  |  | 36,283 |
Maintenance and expenses | 5,038 |  |  | 3,092 |  |  | 4,957 |
Taxes | 98,786 |  |  | 90,166 |  |  | 130,061 |
Office expenses | 35,922 |  |  | 36,223 |  |  | 40,487 |
Freight and transportation | 259,898 |  |  | 234,801 |  |  | 246,762 |
(Decrease) Increase of allowance for doubtful accounts | 685 |  |  | 288 |  |  | (824 | )
Others | 16,790 |  |  | 12,273 |  |  | 15,019 |
Selling, general and administrative expenses | 824,247 |  |  | 687,942 |  |  | 770,292 |

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