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 $54,000 $46,800 May 1 5 9 13 Beginning inventory Sale Purchase Purchase Sale Sale Purchase 90 units 60 units 30 units 120 units 120 units 30 units 45 units $19,800 $86,400 24 $100,800 $28,800 27 30 $35,640 (al) Calculate Saddlery Company's cost of goods sold, gross margin, and ending inventory using FIFO. Cost of goods sold Gross margin Ending Inventory