Yes that was one way as the op was returning from HKT and was also based on 3004 miles as per VA mileage calculator, but have not done this trip so can't confirm if 120SC will post.
PER-SYD-AKL return in J for $2.800, you would get "the business" PER-SYD legs and 763 on the SYD-AKL legs.
Again it all comes down to what value you put on status
