The general ledger of the Blue Spruce Company on March 31, 2021 includes the following selected accounts before adjusting entries have been prepared:

		Debit		Credit
Accounts Receivable		$16,000
Prepaid Insurance		4,800
Supplies		3,000
Equipment		29,000
Accumulated DepreciationEquipment				$8,300
Notes Payable				12,000
Service Revenue				56,000
Salaries Expense		14,200
Telephone Expense		1,200

An analysis of the accounts shows the following:

1.		Accounts due from customers but not yet billed total $1,400.
2.		The note payable is a two-year note and has an interest rate of 4%. It was issued on July 1, 2020 and the interest is due at the beginning of each quarter; the next interest payment is due April 1.
3.		The telephone bill has not yet been received for the month. It is estimated that $300 is owed for the month (Use Accounts Payable).

Prepare the adjusting entries at March 31, assuming adjusting entries are made quarterly.