Accounting rules are presented in note Inventory (note 20).
Significant judgements and estimates are presented in note Inventory (note 20).
| As at | ||
|---|---|---|
| 31 December 2020 | 31 December 2019 | |
| Net value at 1 January | 430 571 | 516 133 |
| Internal manufacture | 282 693 | 263 460 |
| Purchase | 130 752 | 109 101 |
| Amortisation | (491 718) | (426 905) |
| Sale | (7 788) | (24 529) |
| Change in impairment | 1 266 | (6 110) |
| Other changes | − | (579) |
| Net value at 31 December | 345 776 | 430 571 |