Find difference between 2 cells if critera in a 3rd cell is met

[Eric E]

How would I find the difference between two cells depending on what is in a
third cell? For example, in column G1 I want to show the difference E1 and
whichever cell in column F contains the number 1. I was thinking something
along the lines of using SUMPRODUCT to find the row with the #1 and then
somehow subtracting G1 from the number column E that match the row where the
number 1 was found.

 

[T. Valko]

This is VERY confusing! At least, to me it is.

There's probably a simple solution but I don't understand.

You want the formula in cell G1?

This is the really confusing part:

I want to show the difference E1 and whichever
cell in column F contains the number 1.

The literal interpretation of that is to simply subtract 1 from E1 but I'm
sure that's not what you want.

 

[Pete_UK]

So, if you have a 1 in F6, for example, you want E1-E6 in G1?

If so, try this:

=E1-INDEX(E$2:E$100,MATCH(1,F$2:F$100,0))

Hope this helps.

Pete

 

[Eric E]

Pete_UK, Yes that is it. Thank you very much for your assistance. Sorry for
not being clearer in my original post.