please explain how to arrive at these numbers. thanks

Lindon Company is the exclusive distributor for an automotive product that sells for $58.00 per unit and has a CM ratio of 30%. The company's fixed expenses are $435,000 per year. The company plans to sell 30,000 units this year. Required: 1. What are the variable expenses per unit? (Round your "per unit" answer to 2 decimal places.) 2. What is the break-even point in unit sales and in dollar sales? 3. What amount of unit sales and dollar sales is required to attain a target profit of $261,000 per year? 4. Assume that by using a more efficient shipper, the company is able to reduce its variable expenses by $5.80 per unit. What is the company's new break-even point in unit sales and in dollar sales? What dollar sales is required to attain a target profit of $261,000? Variable expense per unit Break-even point in units Break-even point in dollar sales Unit sales needed to attain target profit Dollar sales needed to attain target profit New break-even point in unit sales New break-even point in dollar sales Dollar sales needed to attain target profit 40.60 25,000 $ 1,450,000 40,000 $ 2,320,000 18,750 $ 1,087,500 $ 1,740,000