Hi
assuming that your validated cell is A3 and the target cell A4 enter
the following in A4:
=IF(A3="Y",B1+B2-(A1+A2),IF(A3="N",C1+C2-(A1+A2),""))

HTH
Frank

Hi,

I have validated a cell(Data Validation) where the validation
criteria
allows a list and the source is 2 cells containing Y, N.
Now, depending on the list selected, a formula should be calculated.
ie. if Y, (B1+B2)-(A1+A2)
if N, (C1+C2)-(A1+A2)

I have tried a lot but in vain.

Pls help out.
Sups