I was just looking back at the target's statement and WestSide's gas price figures. Using Santos' conversion factor of 1 GJ of sales gas = 0.172 barrels of oil the contract price can be calculated as:
Gas price (US$/GJ)=$1.45+0.378*JCC*0.172
not sure how important that is to anything but it's the first time i've come across one of the oil linked CSG contracts that allowed you to exactly work out the formula
Warwick