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INVENTORIES (Tables) | 12 Months Ended
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Dec. 31, 2021
INVENTORIES |
Schedule of inventories | ​
​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020
Finished products |  | 7,209,379 |  | 3,894,698
Work in progress |  | 3,453,948 |  | 2,045,158
Raw materials |  | 3,994,655 |  | 1,934,958
Storeroom supplies |  | 1,061,666 |  | 786,401
Imports in transit |  | 1,145,215 |  | 514,321
(-) Allowance for adjustments to net realizable value |  | (3,375) |  | (6,119)
​ |  | 16,861,488 |  | 9,169,417
Schedule of the changes in the allowance for adjustment to net realizable value of inventories | ​
​ | ​ | ​
Balance as of January 1, 2019 |  | (13,704)
Provision for the year |  | (46,693)
Reversal of adjustments to net realizable value |  | 22,028
Exchange rate variation |  | (939)
Balance as of December 31, 2019 |  | (39,308)
Provision for the year |  | (6,562)
Reversal of adjustments to net realizable value |  | 47,259
Exchange rate variation |  | (7,508)
Balance as of December 31, 2020 |  | (6,119)
Provision for the year |  | (6,331)
Reversal of adjustments to net realizable value |  | 9,143
Exchange rate variation |  | (68)
Balance as of December 31, 2021 |  | (3,375)

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