Buddy,
Perhaps you should improve your maths.
SFR get $19m for 10,000t of copper concentrate at 25%.
So 1 tonne = $1900, but it only contains 25% of copper, so 4 tonnes of concentrate = 1 tonne of copper.
So it is 4 X $1900 = $7600.
I believe there are gold credits to make it that price, but not sure of the quantity.
I think you owe Bretto an apology, ashe is closer.