Example 48: Fill in the effects of each of the following on breakeven point, operating income and net income using: 1 = increase, D = Decrease, NC = No Change. Breakeven point in units Net Income Breakeven point in dollars Operating Income Contribution Margin in dollars Contribution Margin Ratio Increase variable costs per unit Decrease variable costs per unit Increase variable costs in total Decrease variable costs in total Increase fixed costs Decrease fixed costs Increase selling price Decrease selling price Increase units sold Decrease units sold Increase tax rate Decrease tax rate