User Exits in Price Determination (Billing)

Dear all,

Please your help with this question:

Which user exits can i review for the price determination when i am creating the Billing Document?

I have an Statistical Condition in a different currency of the billing document, but the rate doesn't match with the condition type.

So I assumed that there is an exit in this part of the process, but I don't know which users exits can i review.

Thanks in advance