The Qantas Fuel Surcharge alone is US$1000 of the ~US$1320.
Here's a Per PAX breakdown of taxes/levies/charges for the return journey:
Code:
QF YQ surcharge (YQ) $500.00
Australian Int'l Passenger Service Charge (WY) $27.30
Australian Passenger Movement Charge (AU) $50.70
US International Departure Tax (US) $16.30
US September 11th Security Fee (AY) $2.50
US Passenger Facility Charge (XF) $4.50
USDA APHIS Fee (XA) $5.00
US Immigration Fee (XY) $7.00
US Customs Fee (YC) $5.50
Australian Int'l Passenger Service Charge (WY) $27.30
US International Arrival Tax (US) $16.30
Total $662.40