Help to calculate the sum the element entries via a fast formula

Summary:

Hello,

We need a fast formula is to calculate the sum of all the amounts from the element entries with a subclassification 'TOTAL_VARIABLE_COMPENSATION'

We are using a value set which is not working for all cases.

We have tried to look for a DBI to retrieve either the input_value_id or the element_entry_value_id or the element_entry_id but are unable to find any.

Can you propose the DBI that can be used to retrieve above ids?

OR if anyone has developed a code to retrieve the sum of the element entry values, how have you been doing it ? is it by using DBI items in a fast formula or via value set?