Ann: GRR - Quarterly Report for 3 months ended 31 March 2018, page-4

It would seem my model is close to the mark.
https://hotcopper.com.au/posts/31865095/single
And it was dated 19March - 12days before the end of the quarter.
1) Average price rec'd - close enough to spot-on.
2) Unit cash operating cost - I was too conservative $86 v $82 actual
3) Cash & receivables $203mil predicted v $200mil actual.
4) Pellet production 625kt predicted v 623kt actual.
5) Pellets sold 612kt predicted v 606kt actual, chips sold 30kt predicted v 26kt actual.
6) Pellets stockpile 275kt predicted v 279kt actual.

If I ever do as well again it will be a miracle.

Pellet production is the big disappointment as I only got to the figure by allowing for annual maintenance shutdown of 10 days during the quarter that didn't actually happen - now scheduled for May. Only reason given for shortfall was rainy weather.