Is it possible to have a Cumulative key figure (similar as 0BALANCE) in a RTC Model?

Hello Experts,

We´re working in S/4HANA (1610 FSP02) with BW (7.51 SP2) and BPC (10.1). We are implementing an RTC solution and, as part of the final deliverables, there's a group of reports in Analysis for Office that should be created.

Some reports show consolidated information from BPC, however, some of them must show transactional data before being consolidated. For these Not consolidated reports, we created some queries at CompositeProv level, however, we are having some issues with presenting cummulated values. We have our RTC amount, however, it present not cummulated data which is correct, however, we are wodering if is there anyway to have at some level (other than BPC level) an additional key figure with the same behavior as Cumulative Balance 0BALANCE?

Thanks.