$param->{'setup_charge'} = $charge;
$discount = $self->calc_discount($cust_pkg, $sdate, $details, $param);
delete $param->{'setup_charge'};
$param->{'setup_charge'} = $charge;
$discount = $self->calc_discount($cust_pkg, $sdate, $details, $param);
delete $param->{'setup_charge'};