timeframes in erection of mills, page-57

JC, short answer is I dont know how close you are without setting up an Excel spreadsheet.
If I was going to pull numbers out of the air I'd use $15.00/t for mining, $20/t for processing, $10/t for admin, 90% recovery into a 25% copper con, $120/t of con transport to Townsville. $100/t transport to a smelter, US$65/t for treatment,US6.5c/lb of copper for refining with a 1% metal deduction.I'd ignore the gold and cobalt credits as they are likely to be immaterial.
No idea how to value the native copper! Quite likely it would have to follow the same route ie the same TCs&RCs.