An alternate method that is now being used to value long term mining assets is referred to as Real Option valuation. This method uses the same input parameters as the DCF method but treats future pricing of metal prices differently due to changes in metal pricing cycles."

As I recall, there will be more than 1 NPV valuation option provided, as with PFS.

If in fact Teck was behind the 8% NPV, we don't have to accept this as true value. The difference of 3% will be several billion. Perhaps this is where the sides differ. This will be a negotiation and Ernesto is no dummy.

DC14