The following transactions took place at Science Supplies during May 2016. May 14 Sold merchandise on credit to Elements for $10,000, terms 2/10,n/30; cost of goods $8,500. May 14 Science Supplies paid $50 to ship the goods to Elements. May 16 Elements returned $500 (sales price) of merchandise purchased May 14 , cost $375. The goods were returned to the stock of inventory. May 17 Received payment from Elements for May 14 sale. May 18 Sold merchandise on credit to Litmus for $6,000, terms 2/10,n/30; cost of goods $3,600. May 26 Litmus kept the merchandise purchased May 18. However, some of it was defective so Science Supplies agreed to a 50% allowance on the total sale. May 31 Received payment from Litmus for the May 18 sale. Journalize the above transactions assuming that Science Supplies uses a perpetual inventory system. Round all calculations to the nearest dollar