Set Analysis statement not working

[karensmith]

Based on user's fiscal quater selection application shold display inventory start amount in one column and end amount in other column. I am not able to get any field values for the below set analysis statments. I don't want to sum values, but to show expression total.

Example user select Q2 FY2009, first statement should display 7/1/2009 and second statment should display 9/1/2009.This based on fiscal calendar starting in April.

Can someone please tell me what is wrong with my syntax?

=({$<

FiscalQuarter = {$(=only(FiscalQuarter))}, FY_QtrStart = {"<=$(=only({<FiscalQuarter={$(=only(FiscalQuarter))}>} FY_QtrStart))>$(=only({<FiscalQuarter={$(=only(FiscalQuarter))}>} FY_QtrStart))"}>} Start_Amount), '$#,##0;($#,##0)'

)

=({$<FiscalQuarter = {$(=only(FiscalQuarter))}, FY_QtrEnd = {"<=$(=only({<FiscalQuarter={$(=only(FiscalQuarter))}>} FY_QtrEnd))>$(=only({<FiscalQuarter={$(=only(FiscalQuarter))}>} FY_QtrEndt))"}>} End_Amount), '$#,##0;($#,##0)'

)

[karensmith]

I tried using this statment, but I'm not getting sum(startAmount Values:

Sum

({$<FiscalQuarter={$(=maxstring([FiscalQuarter]))},FY_QtrStart ={$(=min([FY_QtrStart]))} >} Start_Amount

)

This expression result:

Sum({$<FiscalQuarter={Q1},FY_QtrStart ={4/1/2009} >} Start_Amount)

[karensmith]

SUM

({<MonthStart={'>=$(=Min(MonthStart)) <=$(=min(MonthStart))'}>} Start_Amount

)

SUM

({<MonthStart={'>=$(=Max(MonthStart)) <=$(=Max(MonthStart))'}>} End_Amount+EndX_Amount)

I got my statements to work, but now I need to calculate the avg between the set analysis fields. How canI calculate the avg of the two fields?