Swifty Distribution markets CDs of numerous performing artists. At the beginning of March, Swifty had in beginning inventory 3,900 CDs with a unit cost of $7. During March, Swifty made the following purchases of CDs. March 5 4,875 @ $8 March 21 7,850 @ $10 March 13 6,825 @ $9 March 26 5,800 @ $11 During March 21,000 units were sold. Swifty uses a periodic inventory system.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 3 decimal places for computations.)