A driver travels for 2 hours at 60 miles per hour, during which her car gets 30 miles per gallon of gasoline. She is paid $ 0.50 per mile, and her only expense is gasoline at $ 2.00 per gallon. What is her net rate of pay, in dollars per hour, after this expense?
Answer Choices
A. 20
B. 22
C. 24
D. 25
E. 26