<li><a name="cust_bill_pkg">cust_bill_pkg</a> - Invoice line items
<ul>
<li>invnum - (multiple) key
- <li>pkgnum - <a href="#cust_pkg">package</a>
+ <li>pkgnum - <a href="#cust_pkg">package</a> or 0 for the special virtual sales tax package
<li>setup - setup fee
<li>recur - recurring fee
<li>sdate - starting date