Suppose apartments are in four locations: Location A, Location B, Location C, and Location D. ...

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Suppose apartments are in four locations: Location A, Location B,
Location C, and Location D. Location A is in the city, where your job is.
Location B is 10 minutes farther from your job than Location A. Location
C is 10 minutes farther from your job than Location B, and Location D is
10 minutes farther than Location C. In turn, similar apartments in
Location B rent for $175 less per month than apartments in Location A,
apartments in Location C rent for $175 less than in Location B, and
apartments in Location D rent for $175 less than in Location C.
Suppose the value of your time is $22 per hour and you work 21 days
per month, with each day requiring a round-trip commute from your
apartment to work.
For simplicity, assume rent and the opportunity cost of your time
commuting to work are the only factors influencing the location in which
to rent an apartment.
You should rent an apartment in