Fluctuations in the AUD vs USD will certainly affect the end selling price. the sooner the RMB takes over as world currency the happier I will be.... 
Numbers are too big - it will never work. You have to remember that QLDers cant cope with addition and subtraction of 1 which is why they don't understand daylight saving.
Multiply by 6 or 7? - Far too hard my man
I wish it was 6 or 7 - try 5 at the moment.....
