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COST OF SALES EXCLUDING DEPRECIATION AND AMORTIZATION
 12 Months Ended
Dec. 31, 2020
Analysis of income and expense [abstract]  
COST OF SALES EXCLUDING DEPRECIATION AND AMORTIZATION
8. COST OF SALES EXCLUDING DEPRECIATION AND AMORTIZATION
Cost of sales, excluding depreciation and amortization, include the following components:
For the Years Ended
December 31,
 20202019
Contractors8,671 11,133 
Electricity9,427 10,219 
Fuel5,449 5,744 
Raw materials and consumables 22,217 17,702 
Salaries and benefits37,806 33,152 
Maintenance parts and consumables14,714 12,103 
General and administrative overheads7,714 8,023 
Sales-related costs1,402 646 
Mine operating expenses107,400 98,722 
Severance charges45 225 
Operating costs to metal inventory1,918 299 
Inventory write-downs (Note 14)176 — 
Royalties14,883 10,877 
124,422 110,123