how can i display sum of my profits in new column?

Check out this:

www.toolsjx.com/support/3-suggestions/173-sum-values

Regards,
Tomaž

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