i am trying to get subtotal from this loop ,but not getting - php

Question

My Model
public function get_dat($start_date, $end_date) {
$this->db->select('*');
$this->db->from('jil_mroproducts');
$query = $this->db->get();
if ($query->num_rows() > 0) {
$sum=0;
foreach ($query->result() as $row) {
$this->db->select('*,sum(pocd_sellingprice) as gg');
$this->db->from('jil_jikwarehouse');
$this->db->join('jil_pojmdetail', 'jil_pojmdetail.pojd_id=' . $this->table4 . '.ware_poid', 'left');
$this->db->join('jil_pocjdetail', 'jil_pocjdetail.pocd_qumjid=jil_pojmdetail.pojd_qumjid', 'left');
$this->db->join('jil_users', 'jil_users.usr_id=jil_pojmdetail.pojd_customerid', 'left');
$this->db->group_by('jil_jikwarehouse.ware_productid');
$this->db->where('jil_jikwarehouse.ware_productid', $row->mro_id);
$this->db->where('jil_jikwarehouse.ware_time >=', $start_date);
$this->db->where('jil_jikwarehouse.ware_time <=', $end_date);
$query1 = $this->db->get();
if ($query1->num_rows() > 0) {
$data[] = $row;
}
foreach ($query1->result() as $row) {
$sum+=$row->pocd_sellingprice;
$data[] = $row;
}
$data[]['subtotal']=$sum;// here am trying to get subtotal
}
return $data;
}
return false;
}
VIEW
<table style="width: 100%">
<tr>
<th style="width: 5px">PO ID</th>
<th style="width: 5px">PO Dated</th>
<th style="width: 50px">PO Quantity</th>
<th style="width: 10px">Purchase Value</th>
<th style="width: 10px">Available Stock</th>
<th style="width: 5px">PO Customer ID</th>
<th style="width: 5px">PO Dated</th>
<th style="width: 50px">PO Quantity</th>
<th style="width: 10px">Sale Value</th>
</tr>
<?php
$slno = 0;
$pur=0;
$sel=0;
if (!empty($list)) {
foreach ($list as $user_fetcheach) {
?>
<tr><td colspan="6" style="text-align:left;"><?php echo '<h4>' . $user_fetcheach->mro_name . '</h4>'; ?></td></tr>
<?php if (!empty($user_fetcheach->ware_id)) {
$pur+=$user_fetcheach->pojd_sellingprice;
$sel+=$user_fetcheach->pocd_sellingprice;
$slno++; ?>
<tr>
<td><?php echo $user_fetcheach->ware_pomainid.'-'.$user_fetcheach->ware_poid; ?></td>
<td><?php echo date('d-m-Y',$user_fetcheach->pojd_dated); ?></td>
<td><?php echo $user_fetcheach->pojd_quantity; ?></td>
<td><?php echo $user_fetcheach->pojd_sellingprice; ?></td>
<td><?php echo $user_fetcheach->ware_quantity; ?></td>
<td><?php echo $user_fetcheach->pocd_id.'-'.$user_fetcheach->pocd_pocjid; ?></td>
<td><?php echo date('d-m-Y',$user_fetcheach->pocd_dated); ?></td>
<td><?php echo $user_fetcheach->pocd_quantity; ?></td>
<td><?php echo $user_fetcheach->pocd_sellingprice; ?></td>
</tr>
<?php } ?>
<?php
}
}
?>
<tr><td><b>Grand Total:-</b></td><td></td><td></td><td><?php echo $pur;?></td><td></td><td></td><td></td><td></td><td><?php echo $sel;?></td></tr>
</table>[![enter image description here][1]][1]
Currently am getting a view like this,am trying to display subtotal of each product in the marked place but not getting, please help if anybody can help.
i am getting each row based on each product,also grand total is displayed. please help me to display subtotal of each product