How do I access shipment order charges in the shipment_picklist template?

[TFo]

I'm trying to work with the order charges in the SHIPMENT_PICKLIST template, but I'm struggling to figure out to reference them. I grabbed a snippet from another template and tried the following:

<table>
<mvt:foreach iterator="charge" array="ordershipment:charges">
<tr class="basket-charges">
<td colspan="2">&nbsp;</td>
<td class="charge-description">&mvt:charge:descrip;:</td>
<td class="formatted-charge">&mvt:charge:formatted_disp_amt;</td>
</tr>
</mvt:foreach>
</table>

How do I do this properly?

Thanks,
Todd