Bingo. Many of us here in Australia complain about the prices being exorbitant - the same Apple computer that's marketed as $1,799 USD sells for $2,699 AUD. Take off the GST and you get $2,453 AUD.

1 USD = 1.32 AUD, and 1.32 * $1,799 = $2,374.

So that's a $79 AUD markup on the product applied on Apple's part for buying it in Australia (with the rest being tax that's out of Apple's hands). Yes it's a non-zero markup but the AUD/USD isn't exactly a stable exchange rate so it makes sense that Apple won't align it to exactly the same amount.

Consider that at the start of this year the US pricing of the MBP would have been equivalent to $2,621 AUD, and that in May it would have only been $2,302 AUD. Also consider that this time 4 years ago, the same $1,799 USD would have been $1,741 AUD. If you're a company that doesn't want to change its prices daily, it's hard to set a perfect price in international markets.