Do you mean each row, or each page. If you want to have a sum on the end of each row, you would need to have access to your database and execute a command to create a suitable view. View is like a table, but in view you are able to arrange data or even combine data from more "real" tables.
If you need help with creating a view you can provide as with some more details and we try to help you, but I suggest that you take a look of the topic I mentioned above or to the
mysql page
first.
If you want to display a sum on the end of each page, that probably won't go if you are not familiar with programming.
Regards,
Tomaž
