Understanding lithium demand, page-305

I think It's more appropriate to address profit margin per ton.

What sale price did they get for high iron lithium spodumene? USD$620/ton.
But for low iron (<=0.5%Fe2O3), received USD$780/ton. That's USD$160/ton difference.
Tax concession is likely to get as similar to Sicomines as DRC government owns 30%.

All imo.