Assume working capital is equivalent to $3$ months of the annual operating cost

Calculate Net Smelter Return, Cashflow, IRR?

ROM zn * Gra& % Zn R.y Smelter pyability Zn % smelter P.yability smelter Payability zn Price Pb Price S/t Ag price S/ Freight charge -Zn Freight Cha -Pb Drying char* -Zn Drying Che -Pb t TC Zinc t cturge TC Led Silver Refining Charge Pe uCt c its Capital Cmt Mining Cost Processing (Concentrate) Surface Total Operating cost Discount Rate Tax in Pb Sit Sit Sit (dry' nC_ (dry' to metal 97.610 37.3* 14.959 919% 8.921 6170 2028 6.102 37 2020 2.260 814* 376* 2030 808 13204 US$/t milled US$/t milled US$/t milled US$/t milled US$/t milled 26 % 23.83 25.9 4_22 4.97 58.92 Assume working Capital is equivalent to 3 months Ot the annual Operating cost Calculate Net Smelter Return, Cashflow, IRR?