POS pay later temp Solution
i had create a collection journal linked to the same cash journal cash account.
i had create a pay later journal linked to account receivable account.
i had create a service product called collection with Zero price.
when collection of 100$ only fix the customer and new invoice with QTY=1 of collection product and
set collection journal to 100$
set paylater journal to -100$
total is Zero but it fix customer balance cash account
also report in POS the 3 activity (cash sales- pay later sales - collection )