$amounts{skonto_amount} = $amounts{invtotal} * $self->{percent_skonto};
$amounts{invtotal_wo_skonto} = $amounts{invtotal} * (1 - $self->{percent_skonto});
$amounts{total_wo_skonto} = $amounts{total} * (1 - $self->{percent_skonto});
$amounts{skonto_amount} = $amounts{invtotal} * $self->{percent_skonto};
$amounts{invtotal_wo_skonto} = $amounts{invtotal} * (1 - $self->{percent_skonto});
$amounts{total_wo_skonto} = $amounts{total} * (1 - $self->{percent_skonto});