Grouping same items in the PDF template

Solution

 <#assign item_arry = []>
   <#list record.item?sort_by("item")  as groupItem>
     <#assign Qty=0/>
     <#assign Rate=0/>
      
       <#assign groupId = groupItem.item>
   <#if item_arry?seq_contains(groupId)> <!-- no if body is intentional; skips item array -->
   <#else>
     <#assign seen_style = item_arry + [groupId]/>
<#list record.item as groupItem2>
<#if groupItem.item==groupItem2.item>
<!-- As items are grouping, the corresponding qtys needs to be added -->
  <#assign Qty=Qty+groupItem2.quantity/>
  <#assign Rate=Rate+groupItem2.rate/>
  </#if>
  </#list>

<#if record.item?has_content>

<table class="itemtable" style="width: 100%; margin-top: 10px;"><!-- start items -->

 
     <#if groupItem_index==0>
<thead>
	<tr>
	<th align="center" colspan="3">${groupItem.quantity@label}</th>
	<th colspan="12">${groupItem.item@label}</th>
	<th colspan="3">${groupItem.options@label}</th>
	<th align="right" colspan="4">${groupItem.rate@label}</th>
	<th align="right" colspan="4">${groupItem.amount@label}</th>
	</tr>
</thead>
</#if><tr>
	<td align="center" colspan="3" line-height="150%">${Qty}</td>
	<td colspan="12"><span class="itemname">${groupItem.item}</span><br />${groupItem.description}</td>
	<td colspan="3">${groupItem.options}</td>
	<td align="right" colspan="4">${Rate}</td>
	<td align="right" colspan="4">${groupItem.amount}</td>
	</tr>
     
    <!-- end items --></table></#if>

<hr /></#if>
      </#list>