Mos Motors had the following purchase transactions in December:

Dec.	4		Purchased $6,000 of merchandise on account from Engine Central, terms 4/15, net 30.
	7		Mo returned $1,500 of merchandise because he changed his mind and wanted to order a different type of engine.
	16		Mo paid the balance owing to Engine Central.

Prepare the journal entries to record the purchase transactions on the books of Mos Motors using a perpetual inventory system.

Date	Account Titles and Explanation	Debit	Credit
Dec. 4Dec. 7Dec. 16
Dec. 4Dec. 7Dec. 16
Dec. 4Dec. 7Dec. 16

Prepare the journal entries to record the purchase transactions on the books of Mos Motors using a periodic inventory system.

Date	Account Titles and Explanation	Debit	Credit
Dec. 4Dec. 7Dec. 16
Dec. 4Dec. 7Dec. 16
Dec. 4Dec. 7Dec. 16