Hi Guys,

Hoping someone can help me with this formula.

In Cell S3 I would like the the sum of M3 - Q3, unless there is a value in P3, if there is a value in P3 then i would want the sum to be M3-P3 instead.

Sometimes there will be a value in the P column and some times there wont, but there will always be a value in the M column

If P3 was to be blank i need the sum to go back to the original M3 - Q3

Thanks in advancesheet.png