Your 2021 numbers are M&I resource values. I'm not sure what you have used for the 2013 numbers. According to the FS table 14.17 and the December 21 2012 press release you would have the following resource M&I values:

• 7,106 Mlbs Cu
• 7.37 Moz au
• 455 Mlb Mo

I don't think the differences mean much. What matters more is the change in NPV/IRR and will the SC project be attractive to a buyer given the 8 years it's been on the shelf since the JV was formed.