First I really appreciate this work, it's brilliant. but I have some questions:

1- after partial payment, is an open invoice auto generated by the remaining amount linked to the customer? if yes it is so much good, if no how the remaining amount will be treated in accounting?

2- after closing POS session ended by few days, is the available to pay the remaining amount at another session with next few days?

3- is it possible to know through the POS screen the total due on the customer, if he have more than remaining amount from different Order through specific period like month?

4- is it possible to pay all remaining amount on the customer rather than the remaining amount per order; i.e Customer (X) has 3 orders (1), (2), (3) the remaining amount for each order respectively $100, $200, $300. is it possible to pay all of them $ 600 ($100 + $200 + $300) per customer at one transaction through POS, or it should be paid per order which first order will be paid at $100, $200 for the second order, and $300 for the third.

5- what the serial number of the payment will take the sequence of order number by the session? or it can be linked to the older number of open order?

6- if it possible to show all the credit amount due on the customer when I going to set customer?

7- if it possible to collect prepaid amount i.e the customer order is $90, he paid $100, is it possible to credit his account by $10 ($100 - $90) and use of them at the next order?

please answer my questions with details, you can take of them seriously which will maximize the value  of your app and I will buy it from you and you can raise its price in the store

Hi, i am still have some doubts about the module, i send you an email.

Do you have a demo?

Please, i need to know if i can modify this module.

I send another questions for email, i'll put them here, i hope you can solve them for me.

Could I purchase this module for a community version that is offline?

Could you purchase this module for a community version that is offline?