"Another example is if the POG was under $1000usd per oz....Then forget Bgs....."
If Randgolds currently averaging 0.35 g/t at a total cash cost of US$745 an oz then that would suggest if the average grams were much higher then the Total Cash cost would come down significantly.
Randgold themselves have said they can still make good profits with a gold price of US$800 oz.