sub get_price{
    my $self = shift;

    return (
        ( $self->{_quantity} * $self->{_item_price} ) > 1000
        ? ( $self->{_quantity} * $self->{_item_price} ) * 0.95
        : ( $self->{_quantity} * $self->{_item_price} ) * 0.98
    );
}