when the system takes Purchase requisition and transfer.

Dear friends,

Please, I need your recomendations and I have a mistake when the system takes Purchase requisition.

I have found some notes, could you recommend  one note oss to release 500, or more updated version:

Note 160630 - Conditions in scheduling agreement w/reference to contract

Note 393367 - Price is not transferred from Preq to PO                    > Release 46C, 470

Note 381391 - ME21N: Redesign of price determination routine.     > Release to 46C, 46B

Note 456691 - FAQ: Price determination in purchasing.                     > Does it apply to transactions me21n ?   

I  attach an example.

Thank you very much for your help.