Oups, really sorry Golf didn't want to insult your intelligence once again.

Here's another example fully customized for you.

Capex at 1B and 1 year construction with below cash out.

 o    Y-1: -1B

 Net cash flows:

 o    Y1-21: 1.8B

 Entering all these values in the calculator should give you a positive NPV (3%) around 26B.

Hope this will meet your expectations and if you can find me a study or sale of a copper project that was based on 3% inflation, it will be my pleasure to include 3% in all my future calculations.  For now, 7.5% is the best I could find, so really would appreciate your help for this.

MoneyK