Rogers Products uses a periodic inventory system. The company's records show the beginning inventory of PH4 oil filters on January 1 and the purchases of this item during the current year to be as follows. Jan. 1 Feb. 23 Apr. 20 Beginning inventory Purchase Purchase Purchase Purchase Totals 12 units @ $3.00 16 units @ $3.50 30 units @ $3.80 39 units @ $4.00 20 units @ $5.00 117 units May 4 $36.00 56.00 114.00 156.00 100.00 $ 462.00 Nov. 30 A physical count indicates 22 units in inventory at year-end. Determine the cost of the ending inventory on the basis of each of the following methods of inventory valuation. (Remember to use periodic inventory costing procedures.) (Round your intermediate and final answers to 2 decimal places.) Ending Inventory a. Average cost b. FIFO c. LIFO Clear Sound Audio uses a periodic inventory system. One of the store's most popular products is an MP8 car stereo system. The inventory quantities, purchases, and sales of this product for the most recent year are as follows. Cost per Inventory, Jan. 1 First purchase (May 12) Second purchase (July 9) Third purchase (Oct. 4) Fourth purchase (Dec. 18) Goods available for sale Units sold during the year Inventory, Dec. 31 Number of Units 12 15 21 8 17 73 Unit $299 306 308 315 320 Total Cost $ 3,588 4,590 6,468 2,520 5,440 $ 22,606 51 22 Required: a. Using periodic costing procedures, compute the cost of the December 31 inventory and the cost of goods sold for the MP8 systems during the year under each of the following cost flow assumptions. (Round your unit cost values to 2 decimal places and final answers to the nearest whole dollar amount.) December 31 Inventory Cost of Goods Sold 1. First-in, first-out 2. Last-in, first-out 3. Average cost