Hi,

I'd like to know it it's possible to do billing that is based on variable resources in OpenERP. For examlple:

As IT Service company we offer our customers Virtual Private Hosting Service. The client can configure the VPS itself. He can even add more RAM or storage at any time of usage (the price for the service should be changed according to our pricelist, each service is billed monthly).

So how is it possible to make such a dynamical billing in OpenERP?