Question

A parking garage charges $2 to enter the garage and $1.50 an hour to park.

Answer 1

It would take 4 hours 

For the first hour you'd pay $5 at A and $6.50 at B
For the second hour you'd pay $7 at A and $8 at B 
For the third hour you'd pay $9 at A and 9.50 at B
And for the fourth hour you'd pay $11 at A and $11 at B

Answer 2

How many hours are you "parked?"