Non-GAAP to U.S. GAAP Reconciliation (cont.) ($ thousands) 2020 2019 Cash flow from operating
activities $148,709 $91,880 Capital expenditures (99,279) (99,772) Free cash flow $49,430 ($7,892) Unaudited Free Cash Flow Unaudited Costs Applicable to Sales12 months ended December 31, 2020 ($ thousands, except metal
sales,per ounce and per pound amounts) Palmarejo1 Rochester Kensington Wharf Silvertip Total TotalExcludingSilvertip Costs applicable to sales, including amortization (U.S. GAAP) $143,983 $100,418 $171,204 $102,108
$26,580 $544,293 $517,713 Amortization (37,603) (14,306) (49,477) (12,473) (8,923) (122,782) (113,859) Costs applicable to sales $106,380 $86,112 $121,727 $89,635 $17,657 $421,511 $403,854
Metal Sales Gold ounces 93,898 26,257 124,793 94,379 339,327 339,327 Silver ounces 5,426,875 3,054,139 113,790 158,984 8,753,788 8,594,804 Zinc pounds
3,203,446 3,203,446 - Lead pounds 2,453,485 2,453,485 - Costs applicable to sales Gold ($/oz) $589 $1,377 $975 $923 $931 $895 Silver ($/oz) $9.41 $16.35
NM2 $12.06 $11.65 Zinc ($/lb) NM2 Lead ($/lb) NM2 Includes full-year 2020 financial and production results excluding the second quarter of 2020. Due to the temporary suspension of mining and
processing activities these amounts are not meaningful.