what is the answer for average cost of good sold using this information

Blue Spruce Distribution markets CDs of numerous performing artists. At the beginning of March, Blue Spruce had in beginning inventory 4,200 CDs with a unit cost of \$7. During March, Blue Spruce made the following purchases of CDs. During March 23,000 units were sold. Blue Spruce uses a periodic inventory system. Your answer is partially correct. 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 O decimal places, eg. 1,250. Use weighted-average unit cost rounded to 3 decimal places for computations.)