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COST OF SALES (Tables)
 6 Months Ended
Jun. 30, 2022
Cost of sales [Abstract]  
Schedule of cost of sales
   Gold Copper
Other3
 Total
For the three months ended June 30 2022 2021 2022 2021 2022 2021 2022 2021
Site operating costs1,2
 $1,163  $1,016  $76  $65  $—  $—  $1,239  $1,081 
Depreciation1
 438  448  34  46  4  6  476  500 
Royalty expense 95  92  32  25  —  —  127  117 
Community relations 7  5  1  1  —  —  8  6 
$1,703  $1,561  $143  $137  $4  $6  $1,850  $1,704 
   Gold Copper
Other3
 Total
For the six months ended June 30 2022 2021 2022 2021 2022 2021 2022 2021
Site operating costs1,2
 $2,231  $2,036  $159  $130  $—  $—  $2,390  $2,166 
Depreciation1
 857  902  72  94  7  11  936  1,007 
Royalty expense 183  185  64  48  —  —  247  233 
Community relations 14  9  2  1  —  —  16  10 
$3,285  $3,132  $297  $273  $7  $11  $3,589  $3,416 
1Site operating costs and depreciation include charges to reduce the cost of inventory to net realizable value as follows: $31 million for the three months ended June 30, 2022 (2021: $nil) and $31 million for the six months ended June 30, 2022 (2021: $14 million).
2Site operating costs includes the costs of extracting by-products.
3Other includes corporate amortization.