1996 AHSME Problem 2

Each day Walter gets 3 dollars for doing his chores or 5 dollars for doing them exceptionally well. After 10 days of doing his chores daily, Walter has received a total of 36 dollars. On how many days did Walter do them exceptionally well?

\text{(A)}\ 3\qquad\text{(B)}\ 4\qquad\text{(C)}\ 5\qquad\text{(D)}\ 6\qquad\text{(E)}\ 7

Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.