How to configure Combo in eZee Optimus POS system?

In eZee Optimus combo item sell is possible by following below mention steps.

For example I want to sell Burger & French Fry as combo item with Rate 110 and individual item sell as Burger with 80 and French Fry with 40 

1) Add menu item which you want to sell as combo let's say i configure menu item Burger and French fry with configure price. 

2) Once you add menu item define Modifier group with this both item. 

3) Now add combo item with modifier group as we define with the name of "Combo"

4) Once you add this modifier group assign this all 3 items in menu using menu management.

It will be display both individual items as well as combo items.