Updating Amount in DFKKCOHI through FPCOPARA

Hello Experts,

I understand that when transaction FPCOPARA is run for a correspondence (say account statement priniting), it updates the amount field

DFKKCOHI-SALBE. I observed that this amount is pulled from open account balance through standard FM FKK_ACCOUNT_BALANCE_COMPUTE.

Having said that, do we have an option while running FPCOPARA that will allow us to update a separately calculated amount in DFKKCOHI-SABLE rather than the amount calculated through FKK_ACCOUNT_BALANCE_COMPUTE?

The objective here is,  I want to filter out some amount which standard system has calculated and update the filtered amount in DFKKCOHI-SALBE.

Is there any event/exit which allows us to do that?

Thanks,

Dhiraj