Oh and I forgot to include the expenditures, so even more $$$:

If Teck back in for 20% they must pay 100% expenditures (80 million) and 80% goes to us, so an extra 64 million.

If Teck backs in for 40% they must pay 300% expenditures (240 million) and 60% goes to us, so an extra 144 million)

If teck backs in for 75% they must pay 400% expenditures (320 million) and 25% goes to us, so an extra 80 million. In this case they are also responsible for the project financing.

Add these amounts to the NPV....

Like I said , WIN / WIN no matter what !

If Teck elects to exercise its earn-back option pursuant to the Option Agreement, then Teck has the right to elect to acquire either a 20%, a 40% or a 75% working interest in the Schaft Creek Project from Copper Fox by solely funding subsequent expenditures equal to either 100%, 300% or 400% of Copper Fox's prior expenditures pursuant to the Option Agreement.