Olathe Dodge Chrysler Jeep Ram

I bought a car from olathe dodge and had a price agreed upon. After hours of waiting to sign the contract and two kids in tow, we finally got to the contract. The dealership added $599 to the purchase price of the vehicle and didnt say a word about it, on top of the $299 doc fee that we knew about... the new amount very closely resembled the agreed upon amount (two numbers switched) and unfortunately we didnt notice until after we left the dealership. I called back the finance manager and was told those were all government fees and he would print out a breakdown for me. What I got was a sellers disclosure sheet that we did not sign that said fees are $599...not much of a help!!!! Needless to say, we are not happy! The contract is signed so Im sure there is nothing we can do about this.