My sister won't tell me anything?!

A car my sister wants to buy costs $15,070 and has a 7% sales tax. She saved like $1,500 last month. Will her savings cover the sales tax? If so, how much extra money does she have? If not, how much more does she need? Please explain?

She says she won't let me drive it until I find out her little math problem.

OK, I'll bite. 7% = 0.07 so 0.07*15070 = $1054.90

She has 1500 - 1054.90 left over.

I like your sister. If you can't solve that, you probably shouldn't be driving.