nope, that's blackcomb/whistler last year..no copper
....per Ernst & Young
"DCF NAV calculations have many uses in the mining industry, including justifying project design choices or investment decisions, supporting NI43-101 resource declarations and providing value measurements for accounting tests. While the DCF method is widely accepted, it is subject to limitations and is at times unreliable. A gold sector example is the calculation of a gold project’s NAV by valuators or analysts who then multiply the result by a factor of (say) 1.8 in order to reconcile the DCF NAV with market valuations. This discrepancy is usually attributed to the DCF method not recognizing optionality or exploration potential of the project."
maybe we take the NPV at 5% and then multiply it by 1.8....
so let's say NPV is $5 billion X 1.8=$ 9 billion
$9 billion X 24% /420,000,000 shares = $5.14
so $3 is safe and $5 is maximum