in AUFK give W.B.S.E number and get Order number pass this order number in EKKN-NPLNR you will get the PO qty & PO number
OR
in EKKN you can pass directly WBS Element and you will get the data only for materials but not for services
Note :in EKKN the deletion indicator will not update for that you need to go EKPO table
Regards
Ambarish