At the beginning of 2020. Royal Wolf Co. carried 1,000 units of its product with a unit cost of $20. Royal Wolf Co. sold 2,400 units during 2020. A summary of purchases during 2020 follows: Units Unit Total Cost Cost $20 1,000 1,800 22 Beginning Inventory Purchase #1 Purchase #2 Purchase #3 Total 800 26 $20,000 39,600 20,800 34.800 $115,200 1.200 29 4,800 1. Compute Cost of Goods Sold for 2020 assuming Royal Wolf Co. uses the FIFO cost flow assumption. 2. Compute Cost of Goods Sold at the end of 2020 assuming Royal Wolf Co. uses the LIFO cost flow assumption. 3. Compute Ending Inventory at the end of 2020 assuming Royal Wolf Co. uses the weighted average cost flow assumption. 4. What is Royal Wolf's LIFO reserve at the end of 2020