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COST OF SALES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Analysis of income and expense [abstract] |
Components of cost of sales |
|  |  | Years ended December 31,
| Notes |  |  | 2023 | 2022
Operating costs 1 |  |  |  | $ | 602.2 |  | $ | 526.6 |
Royalties | 37(b) |  |  | 44.8 |  | 43.8 |
Depreciation expense 2 |  |  |  | 216.0 |  | 240.5 |
|  |  |  | $ | 863.0 |  | $ | 810.9 |
1.Operating costs include mine production, transport and smelter costs, and site administrative expenses. 2.Depreciation expense excludes depreciation related to corporate office assets, which is included in general and administrative expenses.

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