Oriole Company Inc had a beginning inventory of 105 units of Product RST at a cost of $7 per unit. During the year, purchases were: Oriole Company uses a periodic inventory system. Sales totaled 1,485 units. Determine the ending inventory and the cost of goods sold under each of the assumed cost flow methods (FIFO, LIFO, and average-cost). Prove the accuracy of the cost of goods sold under the FIFO and LIFO methods. (Round per unit cost to 3 decimal places, e.g. 15.647 and final answers to 0 decimal places, e.g. 5.125.)