Hi AL,
Thank you for the answer.
I got clear why this happening now.
I want to give you the sample but I don't know how to send it to you.
So I made some example data.
So for the solution for this is that I have to made 2 formula.
First I create formula for aggregation first value with reference billing#.
And then I create new formula with first formula (with ref billing#) inside it then made it as exception aggregation first value again with reference material#.
I that what I should do?
Kindly help me.
Regards