The tool that
banks and car dealers use, and the most popular tool to determine
the value of used cars, new cars, and trade-ins is a
Kelly Blue Book You can visit
their site to get information on car value.
You will need to
know the current rate for car loans. Banks and financial
institutions have different loan rates for new and used cars. Look
up today's rates and record them on your sheet. Go to
Bank Rates
Once you know the
value and the interest rate, you are ready to calculate! Use
these helpful sites: