Party Merge

Hi All

We created 2 parties as seen below

1. PARTY1 with 4 customer accounts and sites under it

2. PARTY2 with 1 customer account and site under it

Both parties have active accounts that have open AR Balances

Users want to bring PARTY 2 with the customer account and site under PARTY 1 so that the open balances will show under one customer statement when run for PARTY1

Could you please advise what is the best way to address this?

Thanks!