| Schedule of disaggregation of revenue categorized by commodities sold |
| | 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) | | | | | | | | | | | | | | | Silver | | | | | | | | | | | | | Sales revenue | | $ | 17,212 | | | $ | 13,630 | | | $ | 45,950 | | | $ | 49,011 | | Derivative pricing adjustments | | | (351 | ) | | | (1,547 | ) | | | 755 | | | | (887 | ) | | | | 16,861 | | | | 12,083 | | | | 46,705 | | | | 48,124 | | Zinc | | | | | | | | | | | | | | | | | Sales revenue | | $ | 108 | | | $ | 9,509 | | | $ | 11,883 | | | $ | 29,431 | | Derivative pricing adjustments | | | 73 | | | | 235 | | | | 155 | | | | 890 | | | | | 181 | | | | 9,744 | | | | 12,038 | | | | 30,321 | | Lead | | | | | | | | | | | | | | | | | Sales revenue | | $ | 2,048 | | | $ | 4,482 | | | $ | 7,312 | | | $ | 14,274 | | Derivative pricing adjustments | | | (41 | ) | | | (105 | ) | | | (175 | ) | | | 53 | | | | | 2,007 | | | | 4,377 | | | | 7,137 | | | | 14,327 | | Other by-products | | | | | | | | | | | | | | | | | Sales revenue | | $ | 4 | | | $ | 216 | | | $ | 354 | | | $ | 808 | | Derivative pricing adjustments | | | 26 | | | | 92 | | | | 89 | | | | 306 | | | | | 30 | | | | 308 | | | | 443 | | | | 1,114 | | | | | | | | | | | | | | | | | | | Total sales revenue | | $ | 19,372 | | | $ | 27,837 | | | $ | 65,499 | | | $ | 93,524 | | Total derivative pricing adjustments | | | (293 | ) | | | (1,325 | ) | | | 824 | | | | 362 | | Gross revenue | | $ | 19,079 | | | $ | 26,512 | | | $ | 66,323 | | | $ | 93,886 | | Proceeds before intended use | | | 12,934 | | | | 990 | | | | 23,536 | | | | 1,695 | | Treatment and selling costs | | | (1,417 | ) | | | (5,176 | ) | | | (8,789 | ) | | | (19,190 | ) | | | $ | 30,596 | | | $ | 22,326 | | | $ | 81,070 | | | $ | 76,391 | |
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