lithium prices, page-3

In a previous presentation the company stated that

6% Lithium oxide prices USD $470/tonne
and
Ta2O5 was $90 USD per pound contained Ta2O5.

So I am asking....is this the price of a 6% concentrate.?

If so, then their 16 million tonnes of ore at 1.08% (say 1%) is = to 2.6 million tonnes of concentrate at 6% (100% recovery....not likely but for argument sake)
then at $470 per tonne...we are looking at 1.2 billion$ USD revenue...minus costs.

Any comments? Cut this scenario up if you will. Would like to get a better grasp of this company.
Thanks