I just need help solving part C. I'm not sure where my numbers are going wrong. thanks for the help!

Samuel and Grace Paganelli want to replace their 2008 Ford F-150 pickup, which Samuel drives for work. They already own two vehicles, but need to replace Samuels truck because it has nearly 175,000 miles on the odometer. The replacement must be a vehicle that fits his job as a self-employed electrician Samuel knows that he drives a lot on the job and is worried about the high-mileage penalty on many leases, as well as the fees for excessive wear and tear However, Grace is more concerned about the depreciation loss on a new truck purchase than the mileage penalty and would rather lease the new vehicle. She also likes the idea of having a new, safer truck every few years without the hassle of resale. Samuel also does not like the fact that, if they lease, they would not own the vehicle he will use for work. Warranty protection to insure the truck remains in service is very important They feel that they can afford to spend $580 per month over 4 years for a new vehicle, as long as their other associated expenses such as insurance, gas, and maintenance are not too high The Paganellis also do not know where to start looking for a vehicle without the hassle of negotiating with dealerships a. Identify seven sources of vehicle purchasing information and the type of information available in each source. b. From all the information available. what specific information about the different makes and models is the most relevant to Samuel and Grace in making their purchasing decision? c. What is the highest price they can pay on the new vehicle if they can afford a down payment of $3,600? Assume they finance their purchase for 48 months at 51 percent (Hint: This is a present value of an annuity problem) d. According to the National Automotive Dealer Association (NADA) guide found at www.nadaguides.com, are the Paganellis better off selling their pickup or use it a. Identify sources of vehicle purchasing information and the type of information available in each source (Select all the choices that apply.) c. What is the highest price they can pay on the new vehicle if they can afford a down payment of $3,600? Assume they finance their purchase for 48 months at 51 percent (Hint This is a present value of an annuity problem.) The highest priced vehicle they can afford is 5 (Round to the nearest cent.) ? Enter your answer in the answer box and then click Check