RE:Inflation and associated increase in costs to mine goldEverything has gone up - not just operational + capital costs for a mine-to-be-developed.
Re: NPV, simply increase the discount rate in the analysis to 8% (from 5%) and add 20% to the AISC. The US spot price of gold is heading to $2500 USD in the short-term (whereas all the analysis is quoted in $1600 USD). No biggie....the math , and valuation, remains incredibly compelling.