[Serusers] Prepaid and SERWeb

[Legos Engineering]

Hi,

I find something about prepaid system for my SERWeb. In fact, I want to
print the price of communication in the accounting page for my final
customers. 

I'm thinking about develop myself a db with price by minute and do the
calcul on demand in accounting page. But if something already exist, can
you tell me more about it ?

Thanks