in PLN millions, unless otherwise stated
| from 1 January 2020 to 31 December 2020 | from 1 January 2019 to 31 December 2019 | |
|---|---|---|
| [Note 9.3] Depreciation of property, plant and equipment and amortisation of intangible assets | 2 062 | 2 013 | 
| [Note 11.1] Employee benefits expenses | 5 884 | 5 594 | 
| Materials and energy | 7 914 | 7 945 | 
| External services | 2 226 | 2 655 | 
| [Note 5.2] Minerals extraction tax | 1 625 | 1 520 | 
| Other taxes and charges | 544 | 521 | 
| [Note 4.4] Reversal of impairment losses on property, plant and equipment and intangible assets | (2) | (19) | 
| [Note 4.4] Reversal of write-down of inventories | (29) | (38) | 
| Advertising costs and representation expenses | 61 | 71 | 
| Property and personal insurance | 65 | 59 | 
| [Note 4.4] Impairment losses on property, plant and equipment and intangible assets* | 162 | 217 | 
| [Note 4.4] Write-down of inventories | 127 | 38 | 
| Other costs | 62 | 78 | 
| Total expenses by nature | 20 701 | 20 654 | 
| Cost of merchandise and materials sold (+) | 672 | 681 | 
| Change in inventories of finished goods and work in progress(+/-) | 474 | 337 | 
| Cost of products for internal use of the Group (-) ** | (1 376) | (1 404) | 
| Total costs of sales, selling costs and administrative expenses, of which: | 20 471 | 20 268 | 
| Cost of sales | 18 981 | 18 767 | 
| Selling costs | 432 | 432 | 
| Administrative expenses | 1 058 | 1 069 |