Products Profit/Margin Calculator + Report

This contribution is a combination of the following:

Profit Margin Calculator v1.12 by Farrukh
Products Profit and Cost Report v1 by Farrukh

Basically, all I did was combine the two contributions together, and updated it to work with 1.3.5. The SQL file included in this package inserts data for both contributions in one run.

===WHAT DOES THIS CONTRIBUTION DO?===
Well, in short, it allows you to add a cost field to your products and allow you to track your profit. Its not a perfect contribution, but its on its way there. A report under Admin-_Reports will show you what your profit is :)