The calculator clearly states it isn't anything conclusive.

and feeds such as this
berry 7
apple 7
pear 9
plum 2
is pointless since Apple and Plum washes each other out. So why feed 7 apples and then wash 2 out with plums? What purpose does those recommendations of feeding 20A + 20B + 20C do?

Seriously, where is the 100% solid data backing all these EXACT feeds? We cannot come up with 100% SOLID feeds for simple single fruit feeds, and we can make blank EXACT recommendations?