Father to be

you don't understand that is like your billing cycle is like a woman's
cycle your plan gets changed, and for the remainder of the current
billing cycle, they divide the number of minutes by the number of
daysin the cycle, and then you get however many minutes the number
of days left equals.400 minutes divided by 30 days is 13.3 minutes/day.
So, 178 minutes left divided by 13.3 minutes/day equals 13 days.