Quickfix Products sells a product for $80. Variable costs per unit are $50, and monthly fixed costs are $90,000. Answer the following questions: 1. What is the break-even point in units? 2. What unit sales would be required to earn a target profit of $180,000? 3. Assume they achieve the level of sales required in part b, what is the degree of operating leverage? 4. If sales decrease by 20% from that level, by what percentage will profits decrease