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COST OF SALES | 12 Months Ended
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Dec. 31, 2017
Analysis of income and expense [abstract] |
COST OF SALES | COST OF SALES
| Gold | Copper | Other 5 | Total
For the years ended December 31 | 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016 |
Direct mining cost 1,2,3,4 |  | $3,063 |  |  | $3,215 |  |  | $274 |  |  | $228 |  |  | $28 |  |  | $77 |  |  | $3,365 |  |  | $3,520 |
Depreciation | 1,529 |  | 1,504 |  | 83 |  | 45 |  | 35 |  | 25 |  | 1,647 |  | 1,574 |
Royalty expense | 206 |  | 224 |  | 38 |  | 41 |  | — |  | — |  | 244 |  | 265 |
Community relations | 38 |  | 37 |  | 4 |  | 5 |  | 2 |  | 4 |  | 44 |  | 46 |
Total |  | $4,836 |  |  | $4,980 |  |  | $399 |  |  | $319 |  |  | $65 |  |  | $106 |  |  | $5,300 |  |  | $5,405 |
1 | Direct mining cost includes charges to reduce the cost of inventory to net realizable value of $21 million (2016: $68 million).
2 | Direct mining cost includes the costs of extracting by-products.
3 | Includes employee costs of $1,051 million (2016: $1,048 million).
4 | Cost of sales also includes costs associated with power sales to third parties from our Monte Rio power plant in the Dominican Republic up until its disposition on August 18, 2016.
5 | Other includes all realized hedge gains and losses and corporate amortization.

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