Littleton Books has the following transactions during May. May 2 Purchases books on account fron Readers wholesale for $2,900, terms 2/10,n/30. May 3 Pays cash for freight costs of $160 on books purchased from Readers. May 5 Returns books with a cost of $250 to Readers because part of the order is incorrect. May 10 Pays the full amount due to Readers. May 30 Sells all books purchased on May 2 (less those returned on May 5) for $3,600 on account. Required: 1. Record the transactions of Littleton Books, assuming the company uses a periodic inventory system. 2. Record the period-end adjusting entry to cost of goods sold on May 31, assuming the company has no beginning or ending inventory. Answer is not complete. Complete this question by entering your answers in the tabs below. Record the period-end adjusting entry to cost of goods sold on May 31 , assuming the company has no beginning or ending inventory. (If no entry is required for a transaction/event, select "No Journal Entry Required" in the first account field.)