Small PHP Script Mod

I have a small modification to an existing PHP script that I have. It shouldn't take too long. The script is attached in the zip file. The customer enters a dollar amount and it calculates a percentage of the amount and adds it back on to the amount for a final total. This is done by a javascript embedded within the PHP script. I need to have this amount rounded off to the nearest dollar and cents. The script also passes a credit card charge to authorize.net. The script works fine the way it is. I just want it to capture the credit card security code (CVV2 number) and pass it to [login to view URL] during the credit card authorization for verification. So you must be familiar with [login to view URL] php coding. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Linux, PHP, Javascript.