Ann: Quarterly Report - March 2018, page-170

SDV is still over 2 years away from making a penny, let alone $500m a year. Who knows what the price of lithium will be then. The project might not even be viable and/or with highly reduced margins then.

So assuming that it'll be making $500m a year with current margins is very premature. Sure, if it can make $500m at current lithium prices, then it can justify $6 in 2025, but no sooner. There's a lot of ifs though.