$form->{"sellprice_$i"} = $form->format_amount(\%myconfig, $form->{"sellprice_$i"} * (1 - $form->{tradediscount}));
$form->{"lastcost_$i"} = $form->format_amount(\%myconfig, $form->{"lastcost_$i"});
$form->{"qty_$i"} = $form->format_amount(\%myconfig, $form->{"qty_$i"});
$form->{"sellprice_$i"} = $form->format_amount(\%myconfig, $form->{"sellprice_$i"} * (1 - $form->{tradediscount}));
$form->{"lastcost_$i"} = $form->format_amount(\%myconfig, $form->{"lastcost_$i"});
$form->{"qty_$i"} = $form->format_amount(\%myconfig, $form->{"qty_$i"});