Or just order off MacMall where there aren't any sales taxes AND you usually get extra RAM free stuff and often free overnight shipping,
Why do people order from the Apple Online store again?
Many people don't know that you can get a custom built mac from Mac mall, too. Just to the Apple online store and build the computer without purchasing it and give the specifics to Mac Mall. They'll order the same exact computer, charge you exactly what Apple's site quoted, and ship it to you with no sales tax.
Sweet.