Question

Please help and explain how to solve

Answer 1

$ 7.52

Explanation:

Find charge per minute

59 - 23 min = 36 minutes cost 16.32 - 10.56 = $ 5.76

or $5.76 / 36 min = 16 cents per min

from 59 to 78 = 19 more minutes x .16/min = $ 3.04

so from 59 to 78 will leave 10.56 - 3.04 = $7.52