This one is similar but different i just dont get it! thanks in advance

Saddlery Company sells leather saddles and equipment for horse enthusiasts. Saddlery uses the periodic inventory system. The following schedule relates to the company's inventory for the month of May: Cost Sales May 1 Beginning inventory 120 units $72,000 5 Sale 80 units $62.400 9 Purchase 40 units $26,400 13 Purchase 160 units $115,200 24 Sale 160 units $134,400 27 Sale 40 units $38,400 30 Purchase 60 units $47.520 Calculate Saddlery Company's cost of goods sold, gross margin, and ending inventory using FIFO. Cost of goods sold $ Gross margin $ Ending Inventory $ Calculate Saddlery Company's cost of goods sold, gross margin and ending inventory using weighted average. (Round calculations for cost per unit to 2 decimal places, e.g. 10.52 and final answers to 2 decimal places, e8.610.52.) Cost of goods sold $ Gross margin $ Ending Inventory e Textbook and Media Which cost formula produced the higher gross margin? (Round answers to 2 decimal places, eg, 61.05%) Gross Margin Ratio 9 FIFO % Weighted average produces the higher gross margin