The consumer price index for Planet Econ consists of only two items: books and hamburgers. In 2000, the base year, the typical consumer purchased 10 books for $25 each and 25 hamburgers for $2 each. In 2005, the typical consumer purchased 15 books for $30 each and 30 hamburgers for $3 each. The consumer price index for 2005 on Planet Econ equals:

A.

1.00

B.

1.15

C.

1.25

D.

1.45