Some of the transactions of Sheffield Company during August are listed below. Sheffield uses the periodic inventory method. August 10 Purchased merchandise on account, $10,200, terms 2/10,n/30. 13 Returned part of the purchase of August 10, $1,400, and received credit on account. 15 Purchased merchandise on account, $14,500, terms 1/10,n/60. 25 Purchased merchandise on account, $17,900, terms 2/10,n/30. 28 Paid invoice of August 15 in full. Assuming that purchases are recorded at gross amounts and that discounts are to be recorded when taken: Prepare general journal entries to record the transactions. (If no entry is required, select "No entry" for the account titles and enter 0 for the amounts. Credit account titles are automatically indented when amount is entered. Do not indent manually. List all debit entries before credit entries.)