no idea
at 4 litres per second, SO4 would need around 600 bores to achieve their production target, which might cost $240M
So4 need to at least double the diameter of the bore size for indicative results
companies announce B.S. & you cheer as the share price falls
100 bores may cost S04 about $40M. that is the maximum i would guess. 80 at least; 100 at most.