S6-3. (Learning Objective 3: Applying the average, FIFO, and LIFO methods) Coastal Sporting Goods started April with an inventory of nine sets of golf clubs that cost a total of $1,620. During April, Coastal purchased 25 sets of clubs for $4,750. At the end of the month, Coastal had eight sets of golf clubs on hand. The store manager must select an inventory costing method, and he asks you to tell him both cost of goods sold and ending inventory under these three accounting methods: a. Average cost (round average unit cost to the nearest cent) b. FIFO c. LIFO