We signed a purchase contract last night contingent upon the cash for clunkers money being approved. (if the gov doesn't approve the money, we will get our deposit back). we did not take possession of the car, but we put $1000.00 down and we signed a purchase agreement. However, I have since learned that the sales manager lied to us about the sales tax rate we were being charged to prevent us from going to a different dealership that quoted us a $600 cheaper price on the same exact car. Additionally, the sales tax is not broken down on the contract and it doesn't add up at all to what it should have been even at the correct rate. I contacted the manager via email and asked him to break down the sales tax for me, but he has not responded. Can I cancel the contract without penalty?