The overall equation we can generate from the problem is:
C = (28 + p) * x
where C is the total cost, p is the payment for the locker, and x the number of people
We can calculate for p:
180 = (28 + p) * 5
28 + p = 36
p = 8
Therefore the cost of one person, x = 1:
C = (28 + 8) * 1
C = $36
Answer:
$36