[lisc_dla]

como mencione mi consulta es:

Código Delphi [-]
if Adotable1.Locate('fecha',lbl_fecha.Caption,[]) = false then
begin
    AdoTable1.Filtered := False;
    AdoTable1.Filtered := False;
    Filtro := 'fecha = '+lbl_fecha.Caption;
    AdoTable1.Filter := Filtro;
    AdoTable1.Filtered := True;
    AdoTable1.Open;
end
else
begin
    AdoTable1.Filtered := False;
    AdoTable1.Filtered := False;
    Filtro := 'fecha = '+lbl_fecha.Caption;
    AdoTable1.Filter := Filtro;
    AdoTable1.Filtered := True;
    AdoTable1.Open;
end;

pero donde coloco el codigo de la suma:

Código Delphi [-]
function SumarTotales(Grid: TDBGrid; const AFieldName: string): Currency;
var
  BM: TBookMarkStr;
begin
  Result:= 0;
  with Grid.DataSource.DataSet do
  begin
    BM:= Bookmark;
    DisableControls;
    while not Eof do
    begin
      Result:= Result + FieldByName(AFieldName).AsCurrency;
      Next;
    end;
    BookMark:= BM;
    EnableControls;
  end;
end;

y donde colo este otro codigo

Código Delphi [-]
Edit.Text:= FloatToStr(SumarTotales(DBGrid1,'Total'));

ya estuve intentando y me marca error