Doing a DCF based on your numbers and for Boseto only, 10% discount rate, 10 year mine life, 8% financing, depreciation and 30% tax rate, I get an NPV of $2.18 per share. This is close enough to another posters of $2.50, and yours of $1.91.
DML Price at posting:
$1.21 Sentiment: Hold Disclosure: Held