Mr. Corbin is a salesman. He gets a 5% commission on all sales between $100 and $500 and a 10% commission on all sales above $500. His commission on sales of $783 was:

Answer 1

you could have appended the correction to the original post. Anyway,

783-500 = 283
Apparently he makes no commission on the first $100. Assuming that, he makes

0% on 100 = 0.00
5% on 400 = 20.00
10% on 283 = 28.30
Total = 48.30

If I made a mistake on the first $100, make the fix and adjust the total.