27. Calculate the range of operating margins for the four comparable firms below: Related Party Comparables U.K. Co Able Co Baker Co Charlie Co Delta Co Sales 100 200 150 300 400 Cost of Goods Sold 170) (142) (103) (200) (300) Gross Profit 30 58 47 100 100 Operating Expenses (25) 150) (37) (75) (90) Operating Profit 5 10 25 10 Operating Margin 5% a. The range is from 11.1% to 33.3% b. The range is from 3.33% to 12.5% c. The range is from 25% to 33.33% d. The range is from 2.5% to 8.33%