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23. EXPENSES BY NATURE (Tables) | 12 Months Ended
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Dec. 31, 2018
Expenses By Nature Tables Abstract |
Expenses by nature |
|  |  |  | Consolidated
|  | 12/31/2018 |  | 12/31/2017 | 12/31/2016
Raw materials and inputs |  | (6,759,275) |  | (5,404,801) | (4,518,718)
Labor cost |  | (2,743,460) |  | (2,400,579) | (2,482,111)
Supplies |  | (1,782,576) |  | (1,451,437) | (1,384,437)
Maintenance cost (services and materials) |  | (1,326,894) |  | (1,145,974) | (1,203,294)
Outsourcing services |  | (2,368,387) |  | (2,062,352) | (2,228,786)
Freights |  | (1,802,541) |  | (1,362,087) | (1,263,734)
Depreciation, Amortization and depletion (Note 10,11, and 26) | (1.175.107) |  | (1,408,765) | (1,278,816)
Others |  | (905,128) |  | (591,094) | (495,274)
|  | (18,863,368) |  | (15,827,089) | (14,855,170)
Classified as: |  |  |  |  |
Cost of sales |  | (16,105,657) |  | (13,596,141) | (12,640,042)
Selling expenses |  | (2,263,688) |  | (1,815,107) | (1,696,896)
General and administrative expenses |  | (494,023) |  | (415,841) | (518,232)
|  | (18,863,368) |  | (15,827,089) | (14,855,170)
Depreciation, amortization and depletion |
| ConsColi Consolidated
| 12/31/2018 |  | 12/31/2017 |  | 12/31/2016
Production costs | 1,145,793 |  | 1,376,862 |  | 1,241,425
Sales expenses | 5,850 |  | 8,851 |  | 9,163
General and Administrative Expenses | 23,464 |  | 23,052 |  | 28,228
| 1,175,107 |  | 1,408,765 |  | 1,278,816
Other operating expenses (*) | 97,914 |  | 44,570 |  | 43,681
| 1,273,021 |  | 1,453,335 |  | 1,322,497

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