help with last part

Current Attempt in Progress Marigold Distribution markets CDs of the performing artist Fishe. At the beginning of October, Marigold had in beginning inventory 3,000 of Fishe's CDs with a unit cost of $7. During October, Marigold made the following purchases of Fishe's CDs. During October, 16,350 units were sold. Marigold uses a periodic inventory system. (a) Determine the cost of goods available for sale. Cost of goods available for sale $ Your answer is correct Determine the cost of goods available for sale. Cost of goods available for sale b1) Calculate weighted average cost per unit. (Round answer to 2 decimal places, e.g. 2.25.) Weighted average cost per unit Determine (1) the ending inventory and (2) the cost of goods sold under each of the assumed cost flow methods (FIFO, LIFO, and average-cost). Prove the accuracy of the cost of goods sold under the FIFO and LIFO methods. (Round answers to 0 decimal places, e.g. 1,250. Use weighted-average unit cost rounded to 2 decimal places for computations.) Which cost flow method results in (1) the highest inventory amount for the balance sheet and (2) the highest cost of goods sold for the income statement? (1) results in the highest inventory amount, $ (2) results in the highest cost of goods sold, $