Its KONV pooled table, sorry about the incorrect table name.
In WAERK field units which are coming are with respect to Condition Value and it is correct for the field KWERT. But since its Z condition type the datasource has functionality to consider KWERT and KBETR unit values same in WAERK, we do not get unit w.r.t KBETR as I debugged the datasource execution and checked. Hence I had to enhance WAERS field which is w.r.t KBETR and it worked out for me. Anyways thanks for your inputs. Much appreciated one.