| | | 4 Cost of sales | | |
| 18,844 | 20,084 | Cash operating costs (1) | 2,756 | 2,277 |
| – | (123) | Insurance reimbursement | (16) | – |
| (772) | (935) | By-products revenue (note 3) | (129) | (94) |
| 18,072 | 19,026 | | 2,611 | 2,183 |
| 699 | 1,030 | Royalties | 142 | 84 |
| 134 | 182 | Other cash costs | 25 | 16 |
| 18,905 | 20,238 | Total cash costs | 2,778 | 2,283 |
| 110 | 166 | Retrenchment costs (note 10) | 23 | 14 |
| 182 | 756 | Rehabilitation and other non-cash costs | 109 | 22 |
| 19,197 | 21,160 | Production costs | 2,910 | 2,319 |
| 4,615 | 5,022 | Amortisation of tangible assets (notes 9, 15 and 32) | 690 | 555 |
| 18 | 18 | Amortisation of intangible assets (notes 16 and 32) | 2 | 2 |
| 23,830 | 26,200 | Total production costs | 3,602 | 2,876 |
| (610) | (367) | Inventory change | (52) | (63) |
| 23,220 | 25,833 | | 3,550 | 2,813 |
| | | (1) Cash operating costs comprises: | | |
| 6,747 | 6,882 | – salaries and wages | 944 | 815 |
| 5,316 | 4,688 | – stores and other consumables | 642 | 638 |
| 3,019 | 3,459 | – fuel, power and water | 475 | 363 |
| 2,971 | 3,128 | – contractors | 429 | 358 |
| 791 | 1,927 | – services and other charges | 266 | 103 |
| 18,844 | 20,084 | | 2,756 | 2,277 |