QlikView Expression to multiply count with a field

[#1]

Hello Friends,

I have been calculating using a qlikview expression, however its a count function  in combination with a field .

=(count( {$<Success_Factor >}[Ticket #]) - count(  {$< Success_Factor ={'Success'} >}[Ticket #]))/(count( {$<Success_Factor = {'Success'} >}[Ticket #]) +count( {$<Success_Factor >}[Ticket #]) - count( {$<Success_Factor = {'Success'} >}[Ticket #]))* [Ship Out Performance on time]

I would like to multiply the first part of calculation with the  Ship Out Performance on time.

I do get a null value because I do not know the correct way to calculate.

Any clues to calculate this expression in the best possible way ?

Many Thanks!

[Anonymous]

=Sum(aggr((count( {$<Success_Factor >}[Ticket #]) - count(  {$< Success_Factor ={'Success'} >}[Ticket #]))/(count( {$<Success_Factor = {'Success'} >}[Ticket #]) +count( {$<Success_Factor >}[Ticket #]) - count( {$<Success_Factor = {'Success'} >}[Ticket #])) * [Ship Out Performance on time],YourDims))