Adding Columns to Downloader with Advanced Calculations

Hello,
I use a downloader to retrieve historical stock data. This file is the first attachment titled, "WOPR". I didn't design this file, but I find it very useful. If you enter stock symbol data where it is requested on the "Parameters" page you'll see how the workbook works. It's pretty straightforward.

What I would like to do is add columns to each stock data tab that is produced. An example of the columns/layout I'm trying to achieve is shown in the second attachment.

Any help is appreciated.