13. Revenue and costs
13.1. Geographic and item structure of revenue from contracts with customers
13.2. Other operating revenue
13.3. Revaluation of financial assets
13.4. Other operating costs
13.5. Financial revenue
13.6. Finance costs
13.7. Impairment of assets with indefinite useful life
13.8. Costs of materials and energy, and the value of goods and materials sold
13.9. Impairment of non-financial non-current assets