Final answer:
A customer pays $360 in a year for the telephone service with a fixed monthly fee of $30.
Step-by-step explanation:
The telephone company charges a fixed monthly fee of $30. To find out how much a customer pays in a year, we need to multiply the monthly fee by 12 (since there are 12 months in a year).
So, the annual payment for the telephone service would be 30 x 12 = $360.