Duane, I do see the difference in my Syntax for my DSum I will keep that in mind for the future.
I now have the calculations working fine for the other issue also using your abs formula, I assume this takes the[Plan] record (i.e. 1) and multiplies it by the value field [1]. So this would not work if there was more than 1 [Plan] record in that group?? That is fine for this excercise but I just want to get my head around it.
Thanks for all those that helped, you are godsends!
Cheers
bhoran