You can add a convenience fee (You can also call it anything you want. Processing/Miscellaneous Fee etc..) to every order. See the screenshot from one of our demos below:
![Inline image 1](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/7267476/original/image.png?1372861168)
You can set this fee up in the backend of your restaurant under Manage Restaurant -> Pick Up / Dine In Settings