COST OF SALES

12 Months Ended

Dec. 31, 2019

Analysis of income and expense [abstract]

COST OF SALES

COST OF SALES

	Year ended December 31,
	2019		2018		2017
Inventories at the beginning of the year	2,689,829		2,550,930		1,647,869
Acquisition of business (Note 3)	—		—		400,047
Effect of initial inflation adjustment (Note 4 (cc))	—		191,708		—
Translation differences	(21,919	)	(413,436	)	(97,148	)
Plus: Charges for the year
Raw materials and consumables used and other movements	6,165,654		6,961,704		6,337,283
Services and fees	151,373		158,551		110,949
Labor cost	611,615		699,447		673,821
Depreciation of property, plant and equipment	508,934		456,522		348,415
Amortization of intangible assets	17,805		25,374		35,275
Maintenance expenses	467,090		519,625		480,496
Office expenses	8,513		8,586		7,350
Insurance	9,674		8,769		7,968
Charge of obsolescence allowance	8,413		17,322		(4,028	)
Recovery from sales of scrap and by-products	(23,793	)	(27,744	)	(25,973	)
Others	17,550		15,799		31,631
Less: Inventories at the end of the year	(2,158,298	)	(2,689,829	)	(2,550,930	)
Cost of Sales	8,452,440		8,483,328		7,403,025