Derek decides to buy a new car. The dealership offers him a choice of paying $522.00 per month for 5 years (with the first payment due next month) or paying some amount today. He can borrow money from his bank to buy the car. The bank requires a 6.00% interest rate. What is the most that he would be willing to pay today rather than making the payments?

Derek plans to buy a $31,908.00 car. The dealership offers zero percent financing for 48.00 months with the first payment due at signing (today). Derek would be willing to pay for the car in full today if the dealership offers him $____ cash back. He can borrow money from his bank at an interest rate of 4.01%.

Derek decides to buy a new car. The dealership offers him a choice of paying $517.00 per month for 5 years (with the first payment due next month) or paying some $28,747.00 today. He can borrow money from his bank to buy the car. What interest rate makes him indifferent between the two options?