P6-SA You are provided with the following information for Najera Inc. for the month ended June 30, 2017. Najera uses the periodic method for inventory Unit Cost or Description Beginning inventory Purchase Quantity Date Selling Price June 1 June 4 June 10 June 11 40 $40 135 44 Sale 110 70 Sale return 15 70 Purchase June 18 55 46 Purchase return June 18 June 25 June 28 10 46 Sale 65 75 Purchase 30 50 Instructions (a) Calculate (i) ending inventory, (ii) cost of goods sold, (iii) gross profit, and (iv) gross profit rate under each of the following methods. (1) LIFO. (b) Compare results for the three cost flow assumptions (2) FIFO. (3) Average-cost