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LABOR COSTS (Included Cost of sales and Selling, General and Administrative expenses) (Tables)
12 Months Ended
Dec. 31, 2020
Labor Costs [Abstract]  
Schedule of labor costs
Year ended December 31,
202020192018
Wages, salaries and social security costs677,541 759,678 884,536 
Termination benefits 25,265 28,269 26,601 
Post-employment benefits (Note 20 (i))36,093 39,086 29,862 
 Labor costs738,899 827,033 940,999