Today's boring accounting lesson: From the quarterly reports,...

Today's boring accounting lesson:
From the quarterly reports, Concentrate Produced(t) x Unit cash operating cost = Total Mining & Production costs.
So for March quarter, 646,540(t) x $A82.02 = $A53.03mil.
And for June quarter, 705,408(t) x $A82.10 = $A57.91mil.
And for Sept quarter, 535,000(t) x $A110.00 = $A58.85mil, prediction only

I have reduced estimate of concentrate produced in the current quarter due solely to the wet weather in July & August, hopefully I'm being pessimistic but.....
Of course, if concentrate produced is higher then unit operating cost will be lower.