interesting comparison, page-7

unfortunately being serious now, I feel the problem is the feed grade is too low the last operational update stated expected feedgrade around 2.2% Cu and 0.5 gram a ton Au.
Using a $7400 a ton Cu price thats only equivalent to a gold mine that has a mine reserve of around 3.5 grams a ton.
ok if its open cut but it is not going to make coin if an underground operation IMHO.

Just my opinion and not a miner.
I did express this opinion about a year back to.