The taxes and I...

A few days ago, I bought a CD music of Nicole Scherzinger that cost $12.99 and I pay $1.70 of taxes. It's not so much but I think the government have to put the taxes included in the prices. In Spain we have taxes too but they put the taxes in the price, so, we know how much money we have to pay before buy it. Here, you have to bring your calculator and calculate that. It's easy for you and it's good for the government because the people think that don't pay taxes...