need help with this.

ABC Co. is a wholesaler of guitar picks. The activity for product "Pick it\" during August is shown below: Date Transaction Units U nit cost Total cost 1-Aug Inventory 2,000 P 28.80 P 57,600 7 Purchase 3,000 29.76 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} Total goods available for sale m a. How much are the ending inventory and cost of goods sold under the FIFO - periodic cost ow formula? b. How much are the ending inventory and cost of goods sold under the FIFO - perpetual cost ow formula? c. How much are the ending inventory and cost of goods sold under the weighted average - periodic cost flow formula? d. How much are the ending inventory and cost of goods sold under the weighted average - perpetual cost flow formula