Question

If he has to pay 10% (.10) in State Tax, how much State Tax does he pay?

Answer 1

Is that all or is there more to the problem?

Answer 2

that's all

Answer 3

Hm, that's weird, but I'll give an example anyways.
Let's say the things he buys cost $32, you would multiply that by 10% (.10), and you would get 3.2, so you would add that to 32, and you would get $35.20

Answer 4

So the tax pay in that example is $3.20