It looks like your calculation is mostly correct, I think the main issue is just
requires editing of your Table Calculation.
I think your data needs to be calculated for each Plate Row and Plate Column,
and so I think those two Dimensions need to be placed on the Detail shelf.
Then the Index and Score table calculations will needed to be edited to include these two (see picture below).
I think one other issue is that the check needed to be for "negative control".
210353z-score.twbx 33.0 KB