inglewood project updated, page-3

yes, I couldnt understand this. why?
I have calculated figures which are given by GBM. These figures are true.
My calculate:
Price of gold=$A1000
Estimated production cost by GBM=$A460
60% of their resource to the surface (industry figure, normally between 60% to 80%. figure from Goldnerds)
Profit per ounce: ($A1000-$A460)x60%=$A324/oz
They are planning to produce 20,000 ounce before 30/Jun/2009, then we got $A6.48m profit at end of that time.