Eric's Mechanics had the following inventory of adapters during the month of December. They sold 84 adapters during the month. Instructions: Compute the Cost of Goods Sold and Ending Inventory values for each of the methods below: 1. FIFO Method (7 points) 2. LIFO Method (7 points) 3. Average Method (6 points) Show the step-by step calculations of (1) COGS and then (2) Ending Inventory