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Costs of sales | 12 Months Ended
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Dec. 31, 2019
Costs of sales |
Costs of sales | Note 15 – Costs of sales Costs of sales comprised the following:
|  |  | 2019 |  |  | 2018 |
Costs of stream sales |  |  | $ | 135.1 |  |  | $ | 102.9 |
Costs of prepaid ounces |  |  |  | — |  |  |  | 7.1 |
Mineral production taxes |  |  |  | 2.4 |  |  |  | 2.3 |
Mining costs of sales |  |  | $ | 137.5 |  |  | $ | 112.3 |
Energy costs of sales |  |  |  | 7.3 |  |  |  | 5.9 |
|  |  | $ | 144.8 |  |  | $ | 118.2 |

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