Adding sum of all fields and show it somewhere

Hi,

There's a field in a form called "item cost" which is entered by users and submitted. 

Example form fields follow below:
Name:
Manufacturing Date:
Net Weight:
Ref No:
Item Cost:
Expiration Date:

The Manager would like to see the "total cost" of all the "item cost" entered. Manager has the ACL to see all submissions of all users. Is there a possibility to showcase this total cost to the Manager somewhere? It can be shown where the listing is shown or on a new page as a module.

hello
2 ways, paid an use flexipro plugin (contact ggppdk)
3 create a php code in your template

What's the name of the plugin and how do I buy this? Please help.

Thanks!

contact ggppdk@gmail.com its flexipro plugin

Thanks. Email sent.

I guess ggppdk is busy.

Could you please guide me on how to do this in PHP? If you could show me 1 sample code, I'll probably be able to do the rest.

I have spent over a month on this project using this component now and I can't back out. I'm in a real fix. This is one of the most crucial features of the product I'm building!! Is there no readily available paid extension?