If you didn't attend class today, you could work instead and earn $15$ dollars per hour. However, at the start of the semester you paid tuition and fees that average out to $50$ dollars per class period. You also enjoy class, but value work experience$--$however, we will only consider the monetary costs listed above in this problem.

Your opportunity cost of attending class is

A$.35$

B$.65$

C$.15$

D$.50$