Example 3: Malak Company sells two products X and Y. More information follows: Requirea: 1. What is the overall contribution margin per unit? 2. How many units have to be sold from each product to break-even? 3. How much is the total contribution margin at the break-even point? 4. If the company is operating at a margin of safety of 700 units and the sales mix is maintained, what is the operating income