Problem 6-3B The Manson Company has the following sales, inventory, and purchases during the Gross profit comparisons and cost flow assumptions-per December 31, 2014. 80 units $30/unit Beginning inventory... Feb. 20 sold145 units Apr 30 purchased. Oct 5 purchased225 units Oct. 10 sold 540 units $40/unit 315 units$29/unit Manson Company employs a perpetual inventory system