1. A perpetual inventory worksheet for (a) FIFO and (b) LIFO.? 2. Calculate the periodic weighted average ending inventory and COGS.? 3. Calculate gross profit under each of the above methods. Date Transaction Units $ per unit 1/1 Beginning Inventory 3,200 42.00 42.10 86.00 86.00 42.40 85.00 1/3 Purchase 2,300 1/15 Sale 1/20 Sale 2/2 Purchase 2/10 Sale 2/18 Sale 2128 Purchase 3/4 3/12 Sale 2,400 850 2,000 3,000 120 500 1,000 220 2,200 87.00 42.80 86.00 87.00 42.80 86.00 Sale 3/20 Purchase 3/30 Sale 1,800