Non working team ranking needs help

Hello,
I'm using Office 2010 and I got some advice on ranking on one of these forums and I'm having a problem with the logic. See attachment. The sheet should rank each team mate on the five metrics on the attached sheet and give one overall rank number for each team mate. Most of the code is in the blue section to the right on the attachment. It is returning NA instead of a rank number.

Also, is there any way to have it ignore rows if any field in that row has a divided by zero error? Some of my team mates don't yet have audit scores so I wish to ignore them and I don't want to re-invent the wheel each time I add another employee

I don't really understand how this code works so I'm at a loss fixing it. Thanks for your help