P6-4A Choi Company had a beginning inventory on January 1 of 100 units of Product SXL at a cost of $20 per unit. During the year, the following purchases were made: Mar. 15 300 units at $24 July 20 200 units at $25 Sept. 4 300 units at $28 Dec. 2 100 units at $30 By year end, 750 units were sold. Choi Company uses a periodic inventory system. Instructions (a) Determine the cost of goods available for sale. (b) Determine (1) the cost of the ending inventory, and (2) the cost of goods sold under each of the three assumed cost flow methods (FIFO, weighted average, and LIFO). (c) During a period of rising prices (as is illustrated in this situation), which cost flow method results in (1) the highest inventory amount for the balance sheet, and (2) the highest cost of goods sold for the income statement? (d) Which method would have the most favourable impact on the company's cash flows