AMC 12A 2006 Problem 9

Oscar buys 13 pencils and 3 erasers for \$ 1.00. A pencil costs more than an eraser, and both items cost a whole number of cents. What is the total cost, in cents, of one pencil and one eraser?

Answer Choices
A. 10
B. 12
C. 15
D. 18
E. 20