35 Beginning Inventory and purchases data for light bulbs are as follows: Apr 3 Apr 11 Beginning Inventory Purchase Apr 21 Purchase 15 units @ $15 20 units @$18 25 units @$21 Assuming the business maintains the periodic inventory systems and that the ending inventory consists of 20 units, calculate the cost of merchandise sold and ending inventory under the following cost flow assumptions: First in, First Out Ending Inventory: Cost of Merchandise Sold: Last in, First Out Ending Inventory Cost of Merchandise Sold