Toyota Prius gets 45 miles per gallon and costs $35,000. Ford Focus gets 33 miles per gallon and costs $28,000. When gasoline costs $4 per gallon, what is the breakeven number of miles for the Prius compared to the Focus?
a. 16,625 miles
b. 17,625 miles
c. 18,625 miles
d. 19,625 miles