If we look at the GBG final accounts for 2016 page 23 under 3...

If we look at the GBG final accounts for 2016 page 23 under 3 (c), the depreciation rates are based on 10 to 15 years for machinery. It is unsure whether this rate applies to KML but it may.

Based on a capital cost of the Karara development of $2.7b and another $300m in fixing the problems we have approx. $3b expenditure on equipment.

Based on 10 years we have depreciation of $300m pa and on 15 years $200m pa.

That's my rough guess.

With $300m annual loss then on a cash flow basis they are probably breaking even, if 10 year depreciation used.