Given the following: Number purchased 45 Cost per unit $3 January 1 inventory April 1 June 1 November 1 55 Total $ 135 390 385 480 $ 1,390 60 225 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