Banner Software with Billing

We want to select advertisers to place ads in different places of our site. Track stats and have those stats create an invoice for them to pay. We want this to work on 4 of our websites doing the same thing. Anyone have a suggestion on which software would work the best?

I don’t know of any ad tracking software that generates invoices for you. Although I must admit I haven’t looked very hard. You may look for a service that provides something similar.

I’m sure they take a small percentage of revenue though.