| Cost of sales |
19. Cost of sales Cost of sales is costs that directly relate to production at the mine operating segments and excludes depletion and amortization. The following are components of cost of sales for the three-month and nine-month periods ended September 30, 2025 and 2024: | | Three-month | | | Three-month | | | Nine-month | | | Nine-month | | | | period ended | | | period ended | | | period ended | | | period ended | | | | September 30, | | | September 30, | | | September 30, | | | September 30, | | | | 2025 | | | 2024 Revised (1) | | | 2025 | | | 2024 Revised (1) | | | | | | | | | | | | | | | Salaries and employee benefits | | $ | 7,795 | | | $ | 8,226 | | | $ | 22,261 | | | $ | 24,047 | | Raw materials and consumables | | | 3,600 | | | | 8,603 | | | | 16,726 | | | | 25,793 | | Utilities | | | 985 | | | | 1,090 | | | | 3,126 | | | | 3,367 | | Transportation costs | | | 373 | | | | 1,308 | | | | 1,945 | | | | 4,258 | | Other costs | | | 2,682 | | | | 1,509 | | | | 7,224 | | | | 4,692 | | Costs before intended use | | | 6,759 | | | | 454 | | | | 12,995 | | | | 871 | | Changes in inventories | | | (3,511 | ) | | | (978 | ) | | | (2,900 | ) | | | (1,034 | ) | Inventory write-downs (Note 6) | | | 1,455 | | | | 53 | | | | 3,379 | | | | 871 | | | | $ | 20,138 | | | $ | 20,265 | | | $ | 64,756 | | | $ | 62,865 | |
(1) Certain transportation costs were reclassified from treatment and selling costs in revenue to cost of sales in fiscal 2024. |