Convert value of SmartList to member to use in cross-dimensional (Non-Groovy)

Hello experts, I have an account linked to smartlist where I have "account values" to choose in this smartlist, like this:

For each entity (on columns) and dimension flows (on rows) will have different values of smartlist.

My requeriment is summarize 3 accounts (choosed hardcoded) for flow1 and it depends of the entity put in smartlist account:

Example:

you can see that target account is different depend on Entities.

How Can I achive this?

Thanks!