Periodic inventocy by three methods; cost of goods sold The units of an item avalable for sale during the year were as follows: There are 80 units of the item in the physical inventory at December 31 . The periodic inventory system is used. Determine the ending inventory cost and the cost of goods sold by three methods. Round interim calculations to one decimal and whole dollar: T Orad My wor Note that this exercise uses the periodic inventocy system. FIFO means that the first units purchased are assumed to be the first Therefore, ending imventory costs for the period are calculated by toking the number of items remaining in the plyssical inventory