$cust_pkg_ref = exists($_[0]->{cust_pkg_ref}) ? $_[0]->{cust_pkg_ref} : '';
$bill_now = exists($_[0]->{bill_now}) ? $_[0]->{bill_now} : '';
$invoice_terms = exists($_[0]->{invoice_terms}) ? $_[0]->{invoice_terms} : '';
$cust_pkg_ref = exists($_[0]->{cust_pkg_ref}) ? $_[0]->{cust_pkg_ref} : '';
$bill_now = exists($_[0]->{bill_now}) ? $_[0]->{bill_now} : '';
$invoice_terms = exists($_[0]->{invoice_terms}) ? $_[0]->{invoice_terms} : '';