In the space below, prepare general journal entries, without explanations, for the merchandising transactions listed below for Lowell Company. Assume use of the perpetual inventory system. May 1 Sold merchandise to Cento Company for $2,400, terms 2/10, n/30, goods cost $1,600. 2 Purchased merchandise from Source Corporation for $6,000, terms 2/10, n/30. 3 Gave credit to Cento Company for merchandise returned, $400. Cost of goods returned were $120. 4 Purchased merchandise from Treblow Company for $9,400, terms 2/10, n/30. 7 Received amount owed from Cento Company for balance of May 1 purchase. 11 Returned $1,400 in merchandise to Treblow Company for credit. 11 Paid Treblow Company in full for purchase of May 4. 15 Paid Source Corporation in full for purchase of May 2.