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Production costs (Tables) | 12 Months Ended
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Dec. 31, 2017
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Summary of Product Cost |
|  | 2017 |  |  | 2016 |
|  | $ |  |  | $ |
Labour |  |  | 52,670 |  |  |  | 55,223 |
Fuel |  |  | 23,241 |  |  |  | 22,405 |
Reagents |  |  | 40,839 |  |  |  | 35,292 |
Electricity |  |  | 12,132 |  |  |  | 13,991 |
Mining contractors |  |  | 12,575 |  |  |  | 16,028 |
Operating and maintenance supplies and services |  |  | 56,342 |  |  |  | 45,376 |
Site general and administrative costs |  |  | 23,621 |  |  |  | 20,394 |
Inventory change |  |  | (36,501) |  |  |  | (19,510) |
Royalties, production taxes and selling expenses |  |  | 7,821 |  |  |  | 5,470 |
|  |  | 192,740 |  |  |  | 194,669 |

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