Date: Name Class 210 EYAM2 165 $805 24 Purchased 20 units at $8.25 each Available for sale during December-100 units At the end of December, Wild Optics had 25 units on hand. The 75 amounts for the December 3 1 ending inventory, the cost of go for each of the inventory costing methods listed below units sold created revenue of $13 each. Determine the ds sold for December, and the gross margin for December Gross Profit Ending Inventory Cost of Goods Sol a. Weighted average b. FIFO c. LIFO