need help with 3 and 4

4. Perpetual Inventory (5 points each-20 Total points) Jan. 1 3900-28 Inventory 3,900 units at $41 Apr. 19 Sale 2,800 units June 30 5300 - 11800 Purchase 4,800 units at $47 Sept. 2 Sale 5,300 units Purchase 1100-50 Nov. 15 2,100 units at $49 Show all your work for full credit include units and dollar amounts 1. Determine the ending inventory dollar amount using perpetual FIFO 2. Determine the ending inventory dollar amount using perpetual LIFO 3. Determine the cost of Goods Sold on Sept. 2 (units and dollar amount total) for FIFO 4. Determine the cost of Goods Sold on Sept. 2 (units and dollar amount total) for LIFO