Problem 5-3A Perpetual: Alternative cost flows LO P1 Montoure Company uses a perpetual inventory system. It entered into the following calendar-year purchases and sales transactions Units Sold at Retail Units Acquired at Cost 600 units @ $45 per unit 400 units $42 per unit 200 units e $27 per unit Date Activities Jan. 1 Beginning inventory Feb., 10 Purchase Mar. '13 Purchase Mar 15 Sales Aug. 21 Purchase Sept. 5 Purchase Sept. 10 Sales Totals 800 units @ $75 per unit 100 units @ $50 per unit 500 units e $46 per unit 1,800 units 600 units # $75 per unit 1,400 units 4. Compute gross profit earned by the company for each of the four costing methods. (Round your average cost per unit to 2 decimal places.) FIFO LIFO Weighted Average Specific Identification Sales Less: Cost of goods sold Gross profit 0 $ 0 $ 0 $ 0 $