Okay, I figured it out myself. I used Rules in the 'Compute' button to
set the field value in the Overall Rating field, first to a number
total. (I gave number values to each radio button option like so: E=4,
M=3, N=2, B=1.)
If not a manager, (rbQ6, rbQ7, rbQ8 = ""),
then use the total of option buttons 1-5. The ...