On May 11, Sydney Co. accepts delivery of $24,000 of merchandise it purchases for resale from Troy Corporation. With the merchandise is an invoice dated May 11, with terms of 3/10, n/90, FOB shipping point. The goods cost Troy $16,080. When the goods are delivered, Sydney pays $485 to Express Shipping for delivery charges on the merchandise. On May 12, Sydney returns $1,940 of goods to Troy, who receives them one day later and restores them to inventory. The returned goods had cost Troy $1,300. On May 20, Sydney mails a check to Troy Corporation for the amount owed. Troy receives it the following day. 1. Prepare entries for the buyer, Sydney Co., who uses a periodic inventory system. 2. Prepare entries that the seller should record for (a) the sale and (b) the cash collection. The seller uses a periodic inventory system. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.)