Not sure of my maths here but the Prieska resource is now 1.1Mt of contained Zn and 0.33Mt of contained Cu which at 'effective revenue/t' rates quoted in the announcement of ~US$2K/t for Zn and~US$4.5K/t for Cu adds up to a contained metal value of ~US$3.7B. The value of US$250M has been thrown around in terms of Capex. So what do the Opex costs need to be to make this a winner?
