I have a formula in a family. Very simple - it adds up A, B and C. When I exercise it in the family by changing A, B or C, it jumps rope and spits out great answers, but in the model it doesn't do the math correctly.

Screen caps attached. Any help will be appreciated. I'm under the gun, of course!

Screen caps attached. Any help will be appreciated. I'm under the gun, of course!

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