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 "0" in the appropriate cell. Round the contribution margin percentage to the Variable Fixed Total Operating Contribution Case Revenues Costs Costs Costs Income Margin Percentage a. 2100 $ 400 300 $ 700 $ 1.400 8 1 % b. $ 2,900 $ 300 $ 1,300 % C. $ 1,100 $ 800 L 1,100 % d. $ 1.400 $ 300 50 %