Duo Ltd uses a periodic inventory system and rounds the average unit cost to the nearest dollar. The following data relates to Duo Ltd for the year ended 30 June 2016 : The cost of ending inventory at 30 June 2016 using the weighted average cost method (rounded to the nearest euro) is: Learning Objective 9.6 Explain why cost flow assumptions are required and apply both FIFO and weighted average cost formulas a. 459; b. 465; "c. 499; d. 483