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Production Costs
 12 Months Ended
Dec. 31, 2019
Analysis of income and expense [abstract]  
Production Costs
22. PRODUCTION COSTS
 
 
Production costs are comprised of the following: 
 
 
2019

 
2018

Consumption of raw materials and consumables
 
$
311,812

 
$
184,484

Employee compensation and benefits expense (1)
 
271,684

 
167,879

Contractors and outside services
 
117,018

 
88,475

Utilities
 
41,674

 
26,320

Other expenses
 
74,469

 
31,417

Changes in inventories (2)
 
24,640

 
17,061

 
 
$
841,297


$
515,636


(1)
Employee compensation and benefits expense is comprised of:
 
 
2019

 
2018

Wages, salaries and bonuses
 
$
288,015

 
$
181,957

Share-based compensation
 
4,448

 
2,957

Total employee compensation and benefit expenses
 
292,463

 
184,914

Less: Expensed within General and Administrative expenses
 
(16,156
)
 
(13,919
)
Less: Expensed within Exploration expenses
 
(4,623
)
 
(3,116
)
Employee compensation and benefits expenses included in production costs
 
$
271,684

 
$
167,879

(2)
Includes NRV adjustments to inventory to reduce production costs by $0.4 million for the year ended December 31, 2019 (2018 - increase by $24.3 million).