Ann: Half Year FY2018 Results & Guidance, page-4

I think you need to take into account what portion of those 2.6M BOE is oil and what is gas.

For example in the first half they sold 0.97 Mmboe for $27M revenue which equates to $27 / BOE. When when you look at the production figures for the first half 62% was gas from Madden.

Looking at 2H 56% of the 2.5M will be oil, ~44% Gas so the average price / BOE should increase. I am sure there is specific pricing / per TCF gas and per barrel oil and you would also have to take into account the hedging etc etc.

That's my take anyway, happy to corrected.