Cullumber Company Inc. had a beginning inventory of 110 units of Product RST at a cost of $9 per unit. During the year, purchases were: Feb.20 630 units at $10 Aug. 12 450 units at $12 May 5 500 units at $11 Dec. 8 110 units at $13 Cullumber Company uses a periodic inventory system. Sales totaled 1,540 units. Determine the ending inventory and the cost of goods sold under each of the assumed cost flow methods (FIFO, LIFO, and average-cost). (Round answers to O decimal places, e.g. 150.) Ending inventory Cost of goods sold FIFO SA LIFO AVERAGE-COST