Solution : https://service.sap.com/sap/support/notes/445509 (SAP Service marketplace login required)
Key words :
header tabpage 'delivery/invoice' displays, choosing <enter> inbetween, 'net price' field, attached program change, condition type pbxx, original price entry, program change, header data, condition pbxx, price entry
Related Notes :
| 456691 | FAQ: Price determination in purchasing |