Add new feature to our php application

Hello, I have an email application that let's users schedule and send out campaigns of email groups to their lists of contacts. This application also allows the user to manually generate any email in a campaign for his personal use and also to generate PDF version of these emails. There is currently a page in the system that let's the user modify a particular campaign by entering numeric values in a table, this table of information is then included in the emails of this camaign. I would like to add the functionality to this page so that some automatic math is performed on the user's entered values and then all of this information will be included in the emails and pdf of this particular campaign. Please attached images of reference site to clone this functionality from. Access to the reference site will also be given to the coder. Thank you