BRIEF EXERCISE 8-6 Computing Level of Sales for Target Before-Tax Profit [LO2 - CC7] Lin Corporation has a single product, whose selling price is $180 and whose variable cost is $100 per unit. The company's monthly fixed expenses are $60,000. Required: 1. Using the equation method, compute the unit sales that are required to earn a target before-tax profit of $10,000. 2. Using the contribution margin approach, compute the dollar sales that are required to earn a target before-tax profit of $15,000