Periodic inventory by three methods; cost of goods sold

Periodic inventory by three methods; cost of goods sold The units of an item avaliable 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 final answers fo the nearest whicle deliar