Ann: 2022 AGM Chair's address and corporate presentation, page-54

The other issue is every goldie seems to have a different way of quantifying AISC , ie is a supposed development drive ammortised over say 5 years as a development cost , like a decline is likely to be done by default or is it just part of opex .
An astute accountant will cost it as OPEX to reduce tax in the year of development , (shows up as a booked expense) but a company chairman may want to ammortise it long term to make shareholders happy in the short term, Likewise with keeping the financiers happy in the short term , same with high grading (picking the eyes out of the deposit) , selling more ounces short term , but at a lower value per ounce , that short term profit hurts NPV when the ounces could have been sold for more value when the gold cycle returns to a higher price .
Same with strip ratio last part of the LOM strip goes down to under 1 :1 I remember that from Red October mine , after D&D share price sky rocketed funny that .