"Stuart McDonald, President of Taseko, continued, "When in production, Florence Copper will produce 85 million pounds of copper annually at US$1.13 per pound C1 cash costs over its 20-year mine life. Based on our latest Technical Report, and supported by nearly two years of successful operation of the test facility, the project has an after-tax NPV (8%) of US$680 million at a copper price of US$3.00 per pound. At today's copper price, the NPV rises dramatically to US$920 million, which is roughly three times our current market capitalization. We have de-risked the project significantly since its acquisition in 2014 and believe we are on the cusp of having one of the best low-cost, fully-permitted and financed copper projects in the world."

Wow, why can't our CEO talk-up our projects like that!!?!!

Just a poorly presented sequence of value possibilities, imo.  It is confusing because he is double jumping from 'after-tax using 3yr av prices'  and 'pre-tax using spot price'.