I think I need someone to clarify my understanding...

From all that I have read the Windfall Profits seems to mean the "difference between an established base commodity price ( i.e. Gold) and the price at which the commodity sells above the base price".

In other words if a base price is set at $ 850, anything above that would be considered "windfall profit" ?

Secondly it appears that the windfall profits tax will be set at 70% of the Windfall Profits. 

Also, as I see it, no "cost" items are or can be duducted from the windfall profits number in the calculation of the tax.

If all of this is true the only hope is that the base price can be set real high...

All marginal projects ( probably not FDN) will be unprofitable with no blue sky to look forward to.