The 171.2 million tonnes of inferred resource needs to be upgraded to either the indicated or measured category with infill drilling. If you assume that sufficient drilling had occurred since the FS to upgrade all of the material classed as waste then it would become reserves since it is within the pit shell. The total reserves right now is 941 million tonnes, so 171 would be an 18% increase. Since the average grade is lower in the waste material I would use roughly a 15% increase. So the $ 513M NPV would become $ 590 M. The metal value numbers posted before are not easily translated to estimate added share value, they just look impressive when the word billion is thrown around.