Marlow Company uses a perpetual inventory system. During the year, it entered into the following pur- chases and sales transactions. Date Activities Units Sold at Retail E. Jan. 1 Feb. 10 Mar. 13 Mar. Is Aug. 21 Sept. 5 Sept. 10 Units Acquired at Cost 600 units @ 544/unit 200 units @ $40/unit 100 units @ $20/unit Beginning inventory Purchase Purchase Sales Purchase Purchase Sales Totals 400 units @ $75/unit 160 units @ $60/unit 280 units @ $4B/unit 1,340 units 200 units @ $75/unit 600 units FIFO. Required 1. Compute cost of goods available for sale and the number of units available for sale. 2. Compare the number of units in ending inventory. 3. Compute the cost assigned to ending inventory using (a) FIFO, (b) specific identification-units sold consist of 500 units from beginning inventory and 100 units from the March 13 purchase, and (c) weighted average cost. (Round per unit costs to three decimals, but inventory balances to the dollar) 4. Compute gross profit earned by the company for each of the three costing methods in part 3