The December 31, 2021, unadjusted trial balance for Demon Deacons Corporation is presented below.

Accounts Debit Credit
Cash $9,100
Accounts Receivable 14,100
Prepaid Rent 6,120
Supplies 3,100
Deferred Revenue $2,100
Common Stock 11,000
Retained Earnings 5,100
Service Revenue 44,720
Salaries Expense 30,500
$62,920 $62,920

At year-end, the following additional information is available:

a. The balance of Prepaid Rent, $6,120, represents payment on October 31, 2021, for rent from November 1, 2021, to April 30, 2022.
b. The balance of Deferred Revenue, $2,100, represents payment in advance from a customer. By the end of the year, $525 of the services have been provided.
c. An additional $700 in salaries is owed to employees at the end of the year but will not be paid until January 4, 2022.
d. The balance of Supplies, $3,100, represents the amount of office supplies on hand at the beginning of the year of $1,250 plus an additional $1,850 purchased throughout 2021. By the end of 2021, only $710 of supplies remains.

Required:
a. Update account balances for the year-end information by recording any necessary adjusting entries. No prior adjustments have been made in 2018.
b. Prepare an adjusted trial balance as of December 31, 2018.