dynamic set analysis based on selection made in Listbox

[#1]

Hi,

I have KPI descriptions in a list box and their corresponding id's are available in the data.

When user selects multiple KPI descriptions then we need to perform set analysis based on descriptions/or id' selected.

Example: user selects 5,7,9 kpi descriptions then it should convert like Sum(   {   KPI5  }  Values)+Sum(   {   KPI7  }  Values)+Sum(   {   KPI9}  Values)

How to write set analysis dynamically for this scenario.

[sunny_talwar]

Might be easy to understand if you are able to share a sample

[varshavig12]

Sum of Values based on KPI:

sum({$<KPI>}Values)

OR

Sum of IDs, based on KPI_description:

sum({$<KPI_description>}IDs)