my $last_bill = $cust_pkg->last_bill || 0;
my $next_bill = $cust_pkg->getfield('bill') || 0;
my $free_days = $self->option('free_days');
my $last_bill = $cust_pkg->last_bill || 0;
my $next_bill = $cust_pkg->getfield('bill') || 0;
my $free_days = $self->option('free_days');