Wiechart Industries had provided the data below. Assume the information is within the relevant range. Sales $300,000 Variable Expenses 180,000 Fixed Expenses 105,000 Net Operating income $ 15,000 ANSWER THE FOLLOWING: Briefly show how you arrived at your answer. 1. Calculate the contribution margin ratio? 2. Calculate the Break-even point in sales dollars? 3. What is the current Margin of Safety? 4. By what amount will net operating income increase if sales increase by $18,000? 5. What is the degree of operating leverage based on the current information provided above? 6. If sales increase by 2%, by what percentage would you expect net operating income to increase