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Inventories | 6 Months Ended
--- | ---
Jun. 30, 2021
Inventories |
Inventories | 10. Inventories ​
​ | ​ | ​ | ​ | ​
​ |  | June 30, |  | December 31,
​ | ​ | 2021 | ​ | 2020
Finished products |  | 3,055 |  | 2,626
Work in progress | ​ | 725 | ​ | 647
Consumable inventory |  | 921 |  | 788
Total |  | 4,701 |  | 4,061
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three-month period ended June 30, | ​ | Six-month period ended June 30,
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020
Reversal (provision) for net realizable value | ​ | (12) | ​ | 23 | ​ | 1 | ​ | (39)
​ 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).

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