$2.3 billion After-Tax NPV at Base Case metal prices After-Tax IRR 18.1% at Base Case metal prices Cashflow over the first four years of $951 million per year at Base Case metal prices Base Case development contemplates 27-year mine life Base Case metal prices: Cu: US$3.60/lb, Au: US$1,700/oz, Ag: US$22/oz, Mo: US$14/lb
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