Fill in the blanks for each of the following independent cases.

***(For entries with a zero balance, make sure to enter "0" in the appropriate cell. Round the contribution margin percentage to the nearest wholepercent.)

Variable Fixed tal Operating Contribution Case Revenues Costs Costs Costs IncomeMargin Percentage a. S 500 S 700S 2,100 b. 2,400 c. S900 S 700 d. S 1,500 S 200 900 S 900 S 200 40 %