q report out, page-18

Reiner, it's difficult to put an accurate number on what the AISC will be during commercial operations, however;

Feed grades well above 12g/t (17.8g/t during trial mining) from an open pit with no overburden and processing using a very low cost gravity plant. Grades like these from an open pit from surface are extremely rare. C1 cash costs will be very, very low.
No overburden or underground development means lower than typical sustaining expenditure and this translates to low AISC.
I would be very confident that this will be one of the highest margin gold mines in Australia. If I wasn't confident of that, I wouldn't be in the stock.