The Jamesway Corporation had the following situations on December 2021. a. On December 10, 2021, Jamesway received a $4,400 payment from a customer for services begun on that date and which were completed by December 31, 2021. Deferred service revenue was credited.
b. On December 1, 2021, the company paid a local radio station $2,800 for 40 radio ads that were to be aired, 20 per month, throughout December and January.
c. Prepaid advertising was debited. Employee salaries for the month of December totaling $20,000 will be paid on January 7, 2022.
d. On August 31, 2021, Jamesway borrowed $80,000 from a local bank. A note was signed with principal and 9% interest to be paid on August 31, 2022.

Required:
Prepare the necessary adjusting entries at its year-end of December 31, 2021.