Answer:
a.
Cash $59,500 (debit)
Deferred Revenue $59,500 (credit)
Being Fees Earned But not Billed to Customers
b.
Yes adjusting entry would be necessary. Because there has been movement of cash
Explanation:
The Accrual Principle states that transactions are recorded as they occur not as they are paid.
The Effect of the transaction in the question is to Increase the Assets of Cash while Recognizing the Liability that the company has to the customer in Deferred Revenue.
At the later date when the Company Bills the Clients, the Deferred Revenue would be Eliminated and the Revenue Account be Recognized.