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Inventories | 12 Months Ended
--- | ---
Dec. 31, 2020
Inventories |
Inventories | 11. Inventories
|  | December 31, 2020 |  | December 31, 2019
Finished products |  | 2,626 |  | 2,604
Work in progress |  | 647 |  | 767
Consumable inventory |  | 788 |  | 903
Total |  | 4,061 |  | 4,274
|  | Year ended December 31,
|  | 2020 |  | 2019 |  | 2018
Reversal (provision) for net realizable value |  | 3 |  | 24 |  | (4)
Finished and work in progress products inventories by segments are presented in note 4(b) and the cost of goods sold is presented in note 5(a). Accounting policy Inventories are stated at the lower of cost and the net realizable value. The inventory production cost comprises variable and fixed costs, direct and indirect costs of production and are assigned to individual items of inventory on the basis of weighted average costs method. At the end of the reporting period, net realizable value of inventories are assessed and a provision for losses on obsolete or slow-moving inventory may be recognized. The write-downs and reversals are recognized as “Cost of goods sold and services rendered”.

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- Definition The entire disclosure for inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2020-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=2&code=ifrs-tx-2020-en-r&doctype=Standard&dita_xref=IAS02_g36-39_TI -URIDate 2020-01-01 + Details
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