Kryslanz Co. is a wholesaler of guitar picks. The activity for product "Pick X" during August is shown below: Date 1-Aug Transaction Inventory Units Unit cost 2,000 P 28.80 7 Purchase 3,000 29.76 Total cost P 57,600 89,280 12 Sales 4,200 13 Purchase 4,800 30.40 145,920 14 Sales return 600 22 Sales 3,800 29 Purchase 1,900 30.88 58,672 30 Purchase return 300 30.88 (9,264) P 342,208 Total goods available for sale 13-14 How much are the ending inventory (13) and cost of goods sold (14) under the FIFO - periodic cost flow formula? 15-16 How much are the ending inventory (15) and cost of goods sold (16) under the weighted average -periodic cost flow formula? 17-18 How much are the ending inventory (17) and cost of goods sold (18) under the weighted average - perpetual cost flow formula?