Marlow Company uses a perpetual inventory system. It entered into the following calendar-year 2011 purchases a? Marlow Company uses a perpetual inventory system. It entered into the following calendar-year 2011 purchases a? Marlow Company uses a perpetual inventory system. It entered into the following calendar-year 2011 purchases and sales transactions. Date Activities Units Acquired at Cost Units Sold at Retail Jan. 1 Beginning inventory 770 units @ $ 47.40 /unit Feb. 10 Purchase 370 units @ $ 43.40 /unit Mar. 13 Purchase 185 units @ $ 23.40 /unit Mar. 15 Sales 655 units @ $ 78.40 /unit Aug. 21 Purchase 330 units @ $ 63.40 /unit Sept. 5 Purchase 195 units @ $ 51.40 /unit Sept. 10 Sales 115 units @ $ 78.40 /unit