3Davis Company uses a perpetual inventory system. It entered into the following purchases and sales transactions for the month of March. Compute the cost of Goods Sold and Ending Inventory as well as the Gross Profit for the month of March under the (a) FIFO and (b) LIFO inventory valuation models (40 Points). Units Sold at Retail Date Activities 1-Mar Beginning Inventory 5-Mar Purchase 11.Mar Purchase 18-Mar Sale 21.Mar Purchase 30-Mar Sale Units Acquired at Cost 100 units @ $20 per unit 200 units @ $30 per unit 250 units @ $40 per unit 300 units @ $70 per unit 150 units @ $50 per unit 350 units @ $75 per unit