I based my figures on a similar company who have released financial assumptions of costs and are currently proposing on an open pit operation also in the Pilbara.
Dave has said all the conditions are just right for taking up the operation and I have every confidence he will deliver!
So if we take (100k oz per year x A$1710 per oz) x 15% ( margin ) which is an acceptable return; plus Gold may well increase over the years of the mine and with productivity increases, who knows where it could go!