Pricing type used in billing document

In which table is the Pricing Type that has been used stored? I searched in several tables and could not locate it - VBRK, VBRP, KONV. In copy control the pricing type might be say 'G', but if a user changes the pricing type using the 'Update' prices button in the conditions tab to say 'B' is the pricing type used stored in any of the billing transaction tables?

Thanks