how to add two sum rows in a single pdf page for two accounts - in PBCS/EPBCS

Hi Folks,
When we select parent hierarchy for account, we will get two or more accounts in the rows for a report. earlier we have SUM for all the accounts which will be present in the row and now, we would like to have separate SUM total for each individual account in the report across all the accounts and we would like to page break based on the account and that is not working out it in the management reports.

Note: We are using parent-child relationship (bottom member function).
Ex:- We have 10 accounts under parent A for which we are using bottom member function, the report brings all the 10 accounts. however we would like to introduce a sum(Total) row between row6 and row7 which be the sum of 1st 6 accounts but this is not achievable for today's scenario.