Here's an attempt at some maths. Any errors, please feel free to correct.
One cuft. equals 0.0011 GJ
8 million cuft per day =8800GJ
At roughly $9.50/GJ= $83600/day
It's not easy to find up to date Australian spot prices.
SXY Price at posting:
35.0¢ Sentiment: Buy Disclosure: Held