From the 2005 JQ agreement
Para 27.1.3 FO paid at 60% of captains wage
From table 1, narrow body captain wage between 1 Aug 2006 to 31 July 2007 is $136,860, 60% of that is $82,116.
Yes you can get $82,116/850 per hour above an average corrected of 75 hrs schedule time, but as the calculations are based upon SCHEDULE not time actually flown, the best you could do by schedule is 50 hrs per year if you fly schedule, if the flight time exceeds schedule time, they get closer to the 900 hrs a year which means zip in their pocket.
To earn $100,000 as claimed above, JQ would have to schedule the FOs to fly 1035 hours a year, last time I looked, CASA did not allow JQ to do that.