consmin understanding the mumbo jumbo

Trying to understand the Operations & Market Update, I have worked out the profit on maganese so far. Buried in the bull is good news, by my calculations using their figures will result in a profit of $38,713,600 on manganese for the full year.
Using the 920,000 ton manganese production, the costs of AUD$2.19/dmtu and the fact that we can expect a 10% increase on the last half average price received US$2.10/dmtu ( they say US$2.09, but it actually works out at US$2.098)
New price is US$2.31/dmtu
Total income AUD $135,424,000 costs $96,710,400
Profit $38,713,600 for the full year ( last half was $14.5 million, this half AUD $24,213,600 and that's using their poor figures.
Not looking too bad eh.