Populating variables on web form

Summary

Populating variables on web form

Content

I have a web form that has a select (drop down) element with the following values: fg, pkg, ac.  When one of those is selected, I have a event that contains an if/else if/else condition that assigns a restock percentage based on the previous selection.  I then use that restock value in a calculation.  The calculation is done using a "compute value".  Unfortunately I had to create a hidden element on the page to store that restock value.  I have tried to just click the + sign in the data column to add a restockPercentage number object, but I cannot