Where would Sales Returns be implemented or if you could do the problem, that will be awesome. I have an idea where it should go, but I am unsure.

P6-5A You are provided with the following information for Najera Inc. for the month ended June 30, 2015. Najera uses the periodic method for inventory. Unit Cost or Selling Price $40 Quantity 40 135 110 15 Date Description June 1 June 4 June 10 June 11 June 18 June 18 June 25 June 28 Beginning inventorv Purchase Sale Sale return Purchase Purchase return Sale Purchase 70 70 46 46 75 50 10 65 30 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. (2) FIFO. 3) Average-cost. (b) Compare results for the three cost flow assumptions