Archies Rule sez for any open pit mine"Archie's Rule says that for any mine to be economic over time (and we'retalking here about something that's going to make money throughout morethan one market cycle) you have to be able to recover (Net SmelterRecovery)from your ore a minimum of twice your all-in operating costs. All-inmeansjust that: mining, milling, smelting, refining, G&A, etc., doublingthe all-in cost numbers covers your capital expenditures, a margin forthetime value of money, and a 15 to 20 percent internal rate of return onyourinvestment --
which is the minimum you have to be able to do fora mining venture to work long term."
https://www.safehaven.com/article/12762/the-silver-pit-and-archies-rule
the above is what Jay Taylor, FR, and this Pineapple outfit don't understand.