with the following information for Koetteritz Inc. for the month ended P6.5A (LO 2) You are provided June 30, 2020. Koetteritz uses the periodic method for inventory Description Beginning inventory Purchase Sale Sale return Purchase Purchase return Sale Purchase Unit Cost or Selling Price $40 43 70 70 46 46 76 50 Quantity 40 135 110 15 Date June 1 June 4 June 10 June 11 June 18 June 18 June 25 June 28 10 65 35 Instructions a. Calculate () ending inventory, (i) cost of goods sold, (iii) gross profit, and (iv) gross profit rate under each of the following methods. (1) LIFO. (2) FIFO. (3) Average-cost. b. Compare results for the three cost flow assumptions