Thanks. I think I understand what you're saying and tried the following:
=DSum("[BreakfastRM]","tblTEMPMealCount",[MealLocation]='Location1' And [MealDate]= # " & Format([Forms]![frmSelectDate].[StartDate]-Weekday([Forms]![frmSelectDate].[StartDate])+1), 'mm/dd/yyyy') & "#"
but get "the...