The customer can pay
1 time anually: $1127.58
12 payments of $98.99
To determine how much he will pay if the chooses the monthly plan, multiply the monthly fee by 12
If he chooses the monthly plan he will pay $1187.88 in a year.
Subtract both fees to determine how much he'll save if the chooses to pay the full amount:
He will save $60.3