Question

If I drove 13000miles last year, and got paid .32 cents a mile, thats $4160. I should have gotten .50 cents a mile which is $6500. How many miles did I not get paid for?

Answer 1

4680

Answer 2

basically you got paid 4160, which would have paid for 8320 miles had you been paid at .50 a mile. but you drove 13000 miles. so that's 4160 you didn't get paid for.