It depends on the throughput  I've assumed 120+tpd but the operating cost should be close.  For capital maybe its $2 billion maybe it 4 billion I wont pretend to do a half million PEA in 15 minutes, and neither should you.   However look at the $5.5 billion Hatch debacle at  Galore Creek, nothing is a slam dunk there is still alot of risk here.  Roll the dice prior to March 11 but let everyone know the basis for your profit forcast. 

PS This is a chump change tax right off for Cliff, as for FPX we know they are hardly impartial.