I know its account receivble but what do I credit?>17 Completed a contract for a client for $3,000 on account

5 ) Signed a two-year rental agreement on an office and paid $4,800 cash. Half was for the May 2011 rent and the other half was for the final month’s rent. (Hint: The portion for the final month is considered prepaid rent.) this one is rent expense and prepaid rent but what's the third one?

25 Completed services for a client and immediately collected $1,100

28 Collected $2,500 from the client billed on May 17.

The first entry will be Debit Service Revenue (or appropriate revenue) account and Debit Accounts Receivable for the amount

The second entry will be: Debit Prepaid Rent for half of the payment and Debit Rent Expense for the other half payment, Credit Cash for the total amount.

The third entry: Debit Cash for the amount received and Credit Service Revenue (or appropriate revenue) account for the amount.

The last entry is: Debit Cash for the amount received and Credit Accounts Receivable for the amount received.