Solution : https://service.sap.com/sap/support/notes/144644 (SAP Service marketplace login required)
Key words :
additional key words ea00, base period type = 'x', budget billing plan, solution apply add-, source code manually, long period, source code, billing unit, subsequent add-, installed technically
Related Notes :
| 145309 | Addit. info on extrapolatn w/ base period cat. ='X' |