Ann: Change in substantial holding, page-23

I have made a few rough calculations.Am I right? Get back to me!
The margin in q2 was A$23 per tonne.
600 kt should be sold in q3.
231 kt of this was already produced in q2, but not transported to the port and not shipped.
The production costs of AUD 33 million were already incurred in q2.

That means, with an unchanged margin
370 kt * 23 A$ = 8 million A$
231 kt * 23 A$ = 5 mill A$
+ 33 million A$

I arrive at a cash inflow of approx. 46 million A$ for q3.

This does not take into account
- falling costs per tonne, as they produce more in the same time
- falling costs, as the Sky conveyor belt comes on stream
- higher share of coking coal

what do you think?