How do I compute this?

You are provided with the following information for Sheffield Inc. for The ending inventory the month ended June 30, 2020. Sheffield uses the periodic method for inventory. The cost of goods sold Gross profit Unit Cost or Date Description Quantity Selling Price June 1 Beginning inventory 43 $41 Calculate gross profit rate under each of the following methods. (1) June 4 Purchase 137 45 LIFO. (2) FIFO. (3) Average-cost. (Round answers to 1 decimal place, e.g. 51.2%.) June 10 Sale 108 58 LIFO FIFO AVERAGE-COST June 11 Sale return 18 68 Gross profit rate June 18 Purchase 53 47 of June 18 Purchase return 10 47 June 25 Sale 66 73 End of document June 28 Purchase 33 51 Calculate ending inventory, cost of goods sold, gross profit under each of the following methods. (1) LIFO. (2) FIFO. (3) Average- cost. (Round average-cost method answers to 2 decimal places, e.g. 1,250.25 and other answers to 0 decimal places, e.g. 1,250. Use weighted-average unit cost rounded to 2 decimal places for computations.) LIFO FIFO AVERAGE-COST