Nickel sulfates contain 22.2% Ni metal equivalent.
So 67kt sulfates = 14874t Ni metal equivalent.
Cobalt sulfates contain 20.5% Co equivalent.
So 8kt sulfates = 1640t Co metal equivalent.
Scaling up straight from the PFS (565kt to 1500kt), I had around 70kt Ni sulfates and 8.2kt Co sulfates, so this is quite close as expected.
