When traveling to California last year, that was one thing that I really didn't like - how prices are quoted exclusive of tax.
In Australia, the price quoted has to be the price that is paid by the consumer - the airline industry recently got into trouble for not doing this i.e advertising cheap fares exclusive of the fuel levy, tax and other surcharges.
In addition to this, the amount of tax that was charge very often ends up on the receipt so businesses can use it to calculate their GST credits etc
Did you know that for the price of a 280-Z you can buy two Z-80's? -- P.J. Plauger