Ann: Mt Cattlin Resource and Reserve Upgrade, page-51

In simple terms and round numbers:

214,000 t Li2O 

@ 93% mining recovery = 199,000 t Li2O extracted for processing

@ 75% processing recovery = 149,000 t

@ 6% spod concentrate = 2,488,000 t concentrate


...and yes, pricing and costs will change over time, but assume just for a second that the margin is USD400/t, that = about $1b profit (USD).
...and yes I know resources don't equal reserves etc...   but the point is, this is serious.