You want to acquire a new car, but you're not sure whether you should lease it or buy it. You can buy your chosen model for $50,000. You expect it to be worth $20,000 after you use it for three years. Alternatively, you could lease it for $650 per month for a three-year term, with the first payment due immediately. The lease company has not told you what interest rate they're using to calculate the monthly payments, but you know you could borrow money at an annual percentage rate (APR) of 8%.

A. Assume your tax rate is 40%. If you were to use this car 100% for business, rendering the lease payments tax-deductible, or alternatively, allowing you to deduct depreciation straight-line at $10,000 per year for three years, would you prefer to buy or lease the car? (Hint: Use the after-tax borrowing rate to discount the cash flows.)

The answer is a leasing advantage of 15,590.47

How to do calculations to arrive at this number?