Transfer posting with clearing

Hi, Could you please assist me for the below issue?

There are some sub bank accounts beneath the main bank accounts in SAP for incoming and out going payments. Firstly, the incoming and outgoing payments should be booked in subaccounts, then they should be transferred from subaccounts to main accounts. Normally, I book more than 50 transactions each month, and should post them to the main bank accounts with clearing (from subaccounts) at the end of the month by using TC FB50.

I'm wondering to know that is there any way to post all bookings individually to the main accounts?
Currently, I am doing this one-by-one that is too time taking process! And due to auditing reason, I am not allowed to book them in bulk!

Thank you so much in advance for your consideration.