Help with set analysis expression

[agni_gold]

I have expression

if([%Link Pump Group]<>[DYN Pump Group Id] and [Pump ID]=[DYN Pump Id] and  IsNull([DYN Pump Param Id])=0,[Pump ID])

this expression gives the Pump Ids

I just want to sum the volume for above pump ids .

How to write this expression in set analysis . Please help

[MK_QSL]

=SUM({<

  [%Link Pump Group] = {"=[%Link Pump Group] <> [DYN Pump Group Id]"},

  [Pump ID] = {"=[Pump ID] = [DYN Pump Id]"},

  [DYN Pump Param Id] = {'*'}

  >}Volume)