Wone's Trading Card Inventory Purchases On April 15, Wong sells 4,000 units for $20 unit. What is Wong's Cost of Goods Sold (COGS) using the FIFO method of inventory valuation? What is Wong's COGS using the LFO method of inventory valuation? What is Wong's Cost per Unit using the Weighted Average method of inventory valuation? (round to two decimal places) [11.20] What is Wong's COGS using the Weighted Average method of inventory valuation? What is Wong's Ending Inventory after the sale using the FIFO method of inventory valuation? What is Wong's Ending Inventory after the sale using the LIFO method of inventory valuation?.