Prepare adjusting journal entries, as needed, for the following items. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.)

a.	The Supplies account shows a balance of $550, but a count of supplies reveals only $250 on hand at year-end.

b.	The company initially records the payments of all insurance premiums as prepaid insurance. The unadjusted trial balance at year-end shows a balance of $520 in Prepaid Insurance. A review of insurance policies reveals that $170 of insurance is unexpired.

c.	Employees work Monday through Friday, and salaries of $2,900 per week are paid each Friday. The company's year-end falls on Tuesday.

d.	At year-end, the company received a utility bill for December's electricity usage of $290 that will be paid in early January.