January 1 inventory April 1 June 1 November 1 Number purchased 54 74 64 69 261 Cost of goods sold Cost per unit $3 6 17 8 Total $ 162 444 448 552 $1,606 a. Calculate the cost of ending inventory using the weighted-average method (ending inventory shows 75 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.)