my work Given the following: January 1 inventory April 1 June 1 November 1 Number purchaned 45 55 55 60 225 Coot per unit $3 6 7 Total $ 135 390 365 480 $ 1,390 a. Calculate the cost of ending Inventory using the weighted average method (ending Inventory shows 66 units). (Round the "average unit cost and final answer to the nearest cent.) Cost of ending inventory b. Calculate the cost of goods sold using the weighted average method. (Round your intermediate calculations and final answer to the nearest cent.) Cost of goods sold