Answer:
a) Unbilled Revenues Debit $ 59,500
Service Revenues Credit $ 59,500
b) in case the entity was working on a cash basis then no entry would have been required
Step-by-step explanation:
The accounting entry to record unbilled revenues is to debit the Unbilled Revenues and to credit the Service Revenues account. The revenues is credited because it has been earned and the debit goes to unbilled revenue since it is unbilled.
When the amount in billed, the Unbilled revenues shall be credited and accounts receivables debited.
In an entity using cash basis of accounting, no accruals are recorded and only when the cash is received is the revenue account credited.