UnDP transform help?

I'm trying to get a transformation working on my PDU's.

I currently have this: avg({rPDULoadStatusLoad.1}, {rPDULoadStatusLoad.2}, {rPDULoadStatusLoad.3})

All three of those pollers are assigned to a node, and the transformation is assigned to the node as well.

I generated a report, and this is what I get:

rPDULoadStatusLoad.1 = 29

rPDULoadStatusLoad.2 = 40

rPDULoadStatusLoad.3 = 70

rPDULoadStatusLoadAvg = 2

Am I doing it incorrectly?  If so, is there something I can read on it?