When sending ROFO, the number needs to come with a certain rational.  

If they expect to have more data supporting a 15% to 30% price tag increase within the next 12 months, could be worth the wait.

Obviously, copper price and exchange rate needs to work in our favor at the same time or at least enough to compensate for capex escalation.

Personally, I'd prefer $600M US today vs. 700M US in 12 months, but its not my call.

IMO.

MoneyK