ngf coal worth 400milaud market cap

I have tried various calculations to determine how much ngfs coal should be worth eg spot price ~ 130, cost of extraction ~ 90, net profit~ 40/tonne. Then I threw them out and just guessed that ngf coal = 1/8 mcc coal. Since mcc has a market cap of 3.2billion, then I guess ngf should have a market cap of 400million from coal alone
I also think it should have a market cap of 200million from its gold. Thus there should be room for a 4 fold increase in share price once fully diluted. I think these estimates are conservative
Tomu