Rounding the Summary Row Columns and Adding a Descriptor

Below is the code that I am using to create the row of averages at the top of original post screenshot:

I figured out my issues here. For the rounding the I had to this: Format = "{Average:###.##}",
which worked perfect. I didn't see anywhere in the documentation that said i could do this. It's a good thing i came across this in the forums. It would be nice if this was added to the documentation.