Required: 1. What is the monthly break-even point in unit sales and in dollar sales? 2. Without resorting to computations, what is the total contribution margin at the break-even point? 3-a. How many units would have to be sold each month to attoin a target profit of $90,000 ? 3-b. Verify your answer by preparing a contribution format income stotement at the target sales level. 4. Refer to the original data. Compute the company's margin of safety in both dollar and percentage terms. 5 . What is the company's CM ratio? If the company can sell more units thereby increasing sales by $50,000 per month and there is no change in fixed expenses, by how much would you expect monthly net operating income to increase