6-7A Gross profit comparisons and cost flow assumptions-perpetual LO2, 3 Ontario Skateboard Company has the following inventory and purchases during the fiscal year ended December 31, 2023. Beginning Inventory 310 units @$ 87/unit March March 10 purchased 20 sold May 13 purchased August 5 purchased September 10 sold 229 units @$ 90/unit 401 units @$173/unit 299 units @$ 83/unit 286 units @$ 76/unit 520 units @$173/unit Ontario Skateboard Company employs a perpetual inventory system