C1 Cash Cost, All-In Sustaining Cost ("AISC"), Adjusted EBITDA and Net Debt are non-GAAP measures. C1 Cash Cost, All-In Sustaining Cost ("AISC"), Adjusted EBITDA and Net Debt are non-GAAP measures. C1 Cash Cost Per Payable Pound SoldC1 cash cost is a non-GAAP measure. C1 cash cost represents the cash cost incurred at each processing stage, from mining through to recoverable metal delivered to customers, including mine site operating and general and administrative costs, freight, treatment and refining charges. The C1 cash cost per payable pound sold is calculated by dividing the total C1 cash costs by payable pounds of metal sold.