"At 30 June 2017 the Group had cash on hand of $3.9m, net assets...

"At 30 June 2017 the Group had cash on hand of $3.9m, net assets of $151.7m and a net current asset deficiency of $84.1m. The Group recorded a loss after tax of $135.6m for the year ended 30 June 2017 including impairment of $76.0m relating to the Rocklands project, non-cash depreciation and amortisation charges of $27.0m, ore inventory write down of $19.5m and foreign exchange gains of $3.0m. "

So my maths is a bit rusty...but if you carry the 5, and subtract the 2...

It means that 1.5 years into what seems to be a 5 or 6 year mine life makes it viable at approximately 35000t of Cu Concentrate shipped per month going forward...