Cullumber Company sells leather saddles and equipment for horse enthusiasts. Cullumber uses the perpetual inventory system. The ollowing schedule relates to the company's inventory for the month of May: Calculate Cullumber 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 0 decimal places, e.g. 61,052.) Cost of goods sold $ Gross margin $ Ending inventory $