Depends on locale
$29.97
$0.81
The total tax is $110.00
$7.20
it is
The total tax is $1.40
$1.44 tax paid
287
That depends on the tax rate. Usually you would add the tax to the nominal amount (to the 49.99 in this case). Calculate the tax by multiplying the tax rate (divided by 100) by the purchase amount. Then add this to the purchase amount.
7 %
The total tax is $0.95 and the total price with tax is $15.90.
If you purchase it from Amazon you don't pay tax and it is $249.99 for the 160 GB