add an account summary to invoices

snippets.html

Use this tag instead of the {{invoice_balance_due}}:

{{customer_open_balance}}

put this right below the section with the first balance due, above the line items table:


<div class="invbody">
<table cellspacing="0" class="invbody-items">
	<thead>
		<tr>
			<th class="first">
			<div class="item">Account Summary</div>
			</th>
			<th class="last">
			<div class="linetotal">Amount</div>
			</th>
		</tr>
	</thead>
	<tbody>{{invoice_account_summary_lines}}
	</tbody>
</table>