First of all they said, they are producing at a RUN RATE of 150Koz per year. Doesnt mean they will do 150K in 2012. So that is NOT what has been stated. The production cost surely is not $1600/oz. In Q3 it was $1038 and is projected to be $885 in Q4 2012.
There seams to be much room for errors with you, though