Item Quality

[Meddik]

Hey guys, I'm pretty new to UI creation, and have a ton of questions... but I'll just start with one that's been bugging me for a while.

I'm making a DKP style point system for my guild, and UIs to go with it. The one I'm currently working on creates a point value based on the stats of the item... but it does it for items of all qualities. I was wondering how I could limit it to uncommon items and above. Most of the current code I'm using has come from various other UIs, and I'm just trying to learn by what others have done... but now I'm stuck.

Thanks for the help ahead of time.
Cheers.