have you tried using iif
Total: iif([SumofTotal$] >0,[SumofTotal$] ,0)+iif([qryYearlyTotalsOptions].[SumofAmount]>0,[qryYearlyTotalsOptions].[SumofAmount],0)iif([qryYearlyTotalsCounterTops].[SumofAmount]>0,[qryYearlyTotalsCounterTops].[SumofAmount],0)