Dear friends what is the difference between condition types PBXX and PB00. I am creating a service PO. At the time of creation of PO before saving it, condition tab reveals PRS is getting updatedwith the price that has been entered. Once i save the PO and check it again, condition tab displays PBXX instead of PRS and it is equal to PRS + expected value in PO header. Once i save the PO, again in the entry sheet the entered amount is equal to PRS. What is actually happening?