13.11.2. Finance costs
| 2021 | 2020 | |
| Interest calculated using the effective interest rate method | (332) | (304) |
| Interest on lease | (159) | (132) |
| Interest on tax liabilities | (3) | (2) |
| Net foreign exchange loss | – | (506) |
| Settlement and valuation of derivative financial instruments | (366) | (841) |
| Other | (108) | (104) |
| (968) | (1 889) |
Settlement and valuation of derivative financial instruments related to currency and operating exposure
| 2021 | 2020 | |
| Valuation of derivative financial instruments | 213 | 80 |
|
currency forwards |
(24) | 8 |
|
other |
237 | 72 |
| Settlement of derivative financial instruments | 81 | (258) |
|
currency forwards |
143 | (199) |
|
other |
(62) | (59) |
| 294 | (178) |
During 2021 and 2020 the net positions of valuation and settlement of derivative financial instruments (non-designated instruments for hedge accounting purposes) related mainly to hedging the risk of changes in exchange rates with regard to payments of invoices for crude oil in foreign currency, the currency hedge for liquidity transactions, and to hedging interest rates and payment of bonds interests. The main impact on the valuation and settlement of derivative financial instruments in 2021 was fluctuations EUR and USD exchange rates against PLN.