How to sum entity using property

Hi there,

I face that problematic,

I 'd like, in a report, sum all account for the entity selected.

This is easy, and native.

But, for the entity selected, i 'd like to only have the the sum of all entity corresponding to a certain property.

I explain :

Selection:

An Entity Node

Entity Property = Type

Line : Account

Result :

Only one report, which sum diyamicaly all entity for the corresponding TYPE property

I think about two alternatives :

-> using dimension formula

-> using script

Problem :

For each solution, i need to create new entity members to store the result.

In the reality, I have around 15 value for one property.

what should be your advices to do this ?

thanks a lot,