Answer:
$7,700
Step-by-step explanation:
accrued revenue = $23,100 x 4/12 months = $7,700
the journal entry to record the cash
September 1
Dr Cash 23,100
Cr Unearned revenue 23,100
the adjusting journal entry
December 31
Dr Unearned revenue 7,700
Cr Service revenue 7,700