Even if it is only $50 per tonne (which I think will be higher),...

I noticed that as well. The quarterly said exports of 50kt in Dec23 half and 50kt in Mar24 quarter. Dec23 half will end up being 57kt. Even if they produce 50kt but export 42kt in Mar24 quarter that will be roughly the same. The difference appears to be in the shipment sizes, which depends not only on availability of product but the ships as well. It may be that they export 30+20kt or it maybe that they do 20+20.

Even if it is only $50 per tonne (which I think will be higher), that's still $2.5mln contribution towards expansion costs in the first half of 2024.