Having trouble with the following statement.
What I'm trying to get is that if Southern Brand = Florida, or Southern Brand = Georgia give me etc.
VOLUME PCT:IIF([tbl_SumofValues].[Southern Brand]="Florida" and [tbl_SumofValues].[Southern Brand]="Georgia),"[Format([Volume]/[SumofVolume]*100,"#,##0.000000000)/6]","[Format([Volume]/[SumofVolume]*100,"#,##0.000000000(Format([Volume]/[SumofVolume]*100,"#,##0.000000000])"
The formula in your question will only do the calculation if the SouthernBrand field equals both Florida and Georgia. I assume that will never happen.
Anyway, try replacing the AND with OR. You could also use nested if statements like
=IF([SouthernBrand] = "Flordia", Calculate,
IF([SouthernBrand]="Georgi
Tom