Fill in the blanks for each of the following independent cases. (Click the icon to view the cases.) (For entries with a $0 balance, make sure to enter "O' in the appropriate cell. Round the contribution margin percentage to the nearest whole percent) Variable Fixed Case Revenues Costs Costs a $ 700C S b. $ 2,900 S 400 c. $ 700$ 300 O S d. $ 1,000 S 400 Total Operating Costs Income 1,100 $ 900 $ 1,000 700D Contribution Margin Percentage % % 50 % Enter any number in the edit fields and then continue to the next