Corey is the city sales manager for “RIBS,” a national fast food franchise. Every working day, Corey drives his car as follows:

Miles
Home to office
20
Office to RIBS No. 1
15
RIBS No. 1 to No. 2
18
RIBS No. 2 to No. 3
13
RIBS No. 3 to home
30 

Corey’s deductible mileage is:
A. 0 miles.
B. 50 miles.
C. 66 miles.
D. 76 miles.
E. None of the above.