To add column Due Amount in registrants List page

Hi, using off-line payment only and it might be usefull for me see the "Due Amount" in the Registrants List page. I would like to customize layout and to add a new column with "DUE_AMOUNT" in "AMOUNT" side, is this possible?
I suppose, I should override the files: SITE/administrator/components/com_eventbooking/view/registrants/tmpl/default.php, but I don't have php code experience. can you help me?
Thanks

Hello

Code modification is not in scope of our support, so we would have to charge you small fee for doing the requested modification

Will that be OK? If Yes, submit a support ticket and we will discuss more about it

Tuan