Sam Goody Distribution markets CDs of the performing artist Megan Thee Stallion. In N Units Beginning Inventory Nov. 8 Nov. 14 Nov. 26 100 350 270 250 Unit Price $15 14 13 12 During November, 710 units were sold. Goody uses a periodic inventory system. INSTRUCTIONS Determine the cost of goods available sale and the ending inventory units. Then deter FIFO and Average-Cost inventory valuation methods. Under the Average-Cost method