Fill in the missing data for each of the following independent cases. (Ignore income taxes.) (Do not round intermediate calculations. Leave no cells blank - be certain to enter "O" wherever required.) Sales Revenue Variable Expenses Total Contribution Margin Fixed Expenses Net Income Break-Even Sales Revenue 1. $ 40,000 $ 30,000 $ 40,000 80,000 2. 80,000 15,000 3. 40,000 80,000 50,000 4. 110,000 22,000 38,000