This addon will add an option group where you will have different fields to fill. As you see in the screenshot.
The result is the final pricing table that contains the details you entered.
This addon wont process any payment. Its like any other pricing table for other platforms, a table that contains details of each plan or package you offer to customers. You can link the buy button to any page that users can but things.
The table you see in main page of xenpro now which invite you to submit your custom request is also one of the tables added by this addon.