alot of work must of gone in to this, which i applaud for the effect
my only issue with it is that it seems soo compact - what i mean is everything is bunched togther and kinda looks confusing to those that are not known to excel

maybe an idea to section each bit of info woudl help those that are new to excell to understand it bit better
or maybe
1 page with info
1 page with the calculator

or maybe do a simpler/basic version

(sorry if sound rude, im not trying to be)