What does the carried interest mean?

Total:  $465M to $680M CAD

IMO I would add 
... Copper to $3.50. +250 million 
... Molybdenum  to $12.00. +110 million 

I can only take 25% of the above or $90 million 
Total:  $555M to $770M CAD

If the current metal prices remain so much higher they will eventually have to recognize it