Exhibit 4: Lease or Buy–Input Range
Instructions: You may find information about leasing or purchasing an auto from one of these sites.
www.carpoint.msn.com

www.autogiant.com

www.carsdirect.com

www.driveoff.com

www.leaseguide.com

www.carinfo.com

www.leasespy.com

Input variables  
General information:  
Employee or self-employed (1 or 2)
Monthly payments in year 1
Marginal tax rate
Sales/Use tax
Qualified business use %
Discount rate

2
12
39%
7.05%
80%
8%

Purchase information:  
Purchase price, before sales/use taxes
Downpayment
Interest rate, if financed
Number of monthly loan payments

$37,730
$250
8.15%
60

Lease information:  
Number of monthly payments
Fair market value
Monthly payment, before sales/use tax
Downpayment
Residual value/Trade-in allowance
Lease termination fee

60
$37,730
$ 609.67
$250
$10,326.25
$350