1. Calculate cost of ending inventory and cost of goods sold using periodic FIFO, LIFO, and Weighted Average Cost methods. Required: Invantoru and Cost of Goods Sold using Periodic FIFO. 3) Using Periodic Weighted Average, first calculate the cost per unit using the formula below. Next, apply that same cost per unit to calculate both the Ending Inventory and Cost of Goods Sold. 4) Use the given information and your calculated numbers to complete the Cost of Goods Sold Equation below for all three inventory methods. (All numbers should be positive.)