http://metalsandminerals.net/MetalsMineralsDON-2012.pdf

" Based on sensitivity analysis performed it appears the effect of a rise in zinc prices to $1.50/lb (and Cu at $3.50/lb) will yield a net present value on the first four years of production alone for DON.V of $385 million. In short, Donner Metals is not expected to stay trading here with a market cap under $45 million for long."