You may want to use the second recipe
(Customizing Grand Totals with Table Calculations)
from the foundational article by Jonathan Drummey :
Please find the attached.
QoQ and WS_YF.twbx 786.9 KB
Thank you very much, Yuri. I was able to replicate what you did in your file.
After reviewing your work and watching a couple videos demoing the concept on YouTube, I think I have a better grasp conceptually.
Thanks again for your help and patience as I grapple with these concepts. Appreciate it.