Saddlery Company sells leather saddles and equipment for horse enthusiasts. Saddlery uses the perpetual inventory system. The following schedule relates to the companys inventory for the month of May: Cost Sales May 1 Beginning inventory 180 units $99,000 5 Sale 120 units $85,800 9 Purchase 60 units $36,300 13 Purchase 240 units $158,400 24 Sale 240 units $184,800 27 Sale 60 units $52,800 30 Purchase 90 units $65,340 (a1) Calculate Saddlery Companys cost of goods sold, gross margin, and ending inventory using FIFO. Cost of goods sold $? Gross margin $ ? Ending Inventory $ ?