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23. EXPENSES BY NATURE (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Expenses By Nature Details 1Abstract
Production costs	R$ 1,145,793	R$ 1,376,862	R$ 1,241,425
Sales expenses	5,850	8,851	9,163
General and Administrative Expenses	23,464	23,052	28,228
Depreciation, amortization and depletion	1,175,107	1,408,765	1,278,816
Other operating expenses	(1,330,706)	(646,944)	(1,076,730)
Total	R$ 1,273,021	R$ 1,453,335	R$ 1,322,497

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The amount of production costs.

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The amount of expenses aggregated according to their nature (for example, depreciation, purchases of materials, transport costs, employee benefits and advertising costs), and not reallocated among functions within the entity.

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The amount of expense relating to general and administrative activities of the entity.

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The amount of miscellaneous other operating expenses. [Refer: Other operating income (expense)]

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The amount of all operating expenses.

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The amount of expense relating to selling activities of the entity.

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