Montoure Company uses a perpetual inventory system. It entered into the following calendar-year 2013 purchases and sales transactions. Activities Units Sold at Retail Date Jan. 1Beginning inventory Feb. 10 Purchase Mar. 13 Purchase Mar. 15 Sales Aug. 21 Purchase Sept. 5Purchase Sept. 10 Sales Units Acquired at Cost 700 units $50/unit 300 units $46/unit 100 units $40/unit 780 units $70/unit 110 units $55/unit 570 units $52/unit 680 units $70/unit Totals 1,780 units 1,460 units