1 Problem 3: 6 marks (15 minutes) 2 Ava Inc. had the following transactions on its inventory during 2021. Ava uses perpetual inventory system. Ava started the year with 300 units of inventory at a cost of $19. 3 Date 4 5 March 6 April 7 June 8 August 9 September 10 November 11 Selling Unit Purchases Price per unit Unit Sales Price 500 $20 650 $21 800 $30 200 $32 700 $22 550 $33 12 Required: 13 a. Calculate the total cost of goods sold for the year 2021 using perpetual moving average. 14 b. Calculate ending inventory using perpetual moving average. 15