<li>printed - how many times this invoice has been printed automatically
</ul>
<li><a name="cust_bill_pkg">cust_bill_pkg</a> - Invoice line items
<ul>
<li>invnum - (multiple) key
<li>printed - how many times this invoice has been printed automatically
</ul>
<li><a name="cust_bill_pkg">cust_bill_pkg</a> - Invoice line items
<ul>
<li>invnum - (multiple) key