b) You are provided with the following information for Koetteritz Inc. for the month ended June 30, 2017. Koetteritz uses the periodic method for inventory Quantity Unit Cost or Selling Price $40 43 40 70 Date June 1 June 4 June 10 June 11 June 18 June 18 June 25 June 28 Description Beginning inventory Purchase Sale Sale return Purchase Purchase return Sale Purchase 135 110 15 55 70 46 10 46 65 76 35 50 Instructions (a) Calculate (1) ending inventory, (ii) 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