You can achieve this by updating following file.
app\design\frontend\YOUR_PACKAGE\YOUR_THEME\template\wishlist\item\list.phtml
replace your file code with below.
<?php
$columns = $this->getColumns();
$wishListTotal = 0;
?>
<table class="clean-table linearize-table" id="wishlist-table">
<thead>
<tr>
<?php
/* @var $column Mage_Wishlist_Block_Customer_Wishlist_Item_Column */
foreach ($columns as $column):
$_blockName = str_replace('.','-',strtolower($column->getNameInLayout()));
?>
<th class="<?php echo $_blockName; ?>"><?php echo $column->getTitle();?></th>
<?php endforeach; ?>
</tr>
</thead>
<tbody>
<?php if (count($this->getItems())): ?>
<?php foreach ($this->getItems() as $item):
$_product = $item->getProduct();
$_priceIncludingTax = Mage::helper('tax')->getPrice($_product, $_product->getFinalPrice());
$wishListTotal += $item->getQty() * $_priceIncludingTax;?>
<tr id="item_<?php echo $item->getId();?>">
<?php
foreach ($columns as $key => $column):
$_blockName = str_replace('.','-',strtolower($column->getNameInLayout()));
/* Override default column title in layout, useful for certain cases like select all box */
if ($column->getRwdTitle()) {
$_rwdLabel = $column->getRwdTitle();
} else {
$_rwdLabel = ($column->getTitle()) ? $column->getTitle() : false;
}
?>
<td class="<?php echo 'wishlist-cell'.$key; ?> <?php echo $_blockName; ?>"<?php if($_rwdLabel): ?> data-rwd-label="<?php echo $_rwdLabel; ?>"<?php endif; ?>><?php $column->setItem($item); echo $column->toHtml($item);?></td>
<?php endforeach; ?>
</tr>
<?php endforeach ?>
<?php else: ?>
<td colspan="<?php echo count($columns);?>" class="wishlist-empty"><?php echo $this->__('This quote has no Items');?></td>
<?php endif; ?>
</tbody>
<tfoot style="border-top:1px solid #c0c0c0;">
<tr>
<td colspan="3" class="product-name a-right"><?php echo $this->__("Grand Total");?></th>
<td class="product-name cart-cell"><?php echo Mage::helper('core')->currency($wishListTotal, true, false); ?></th>
<td colspan="2"> </td>
</tr>
</tfoot>
</table>
<?php foreach ($columns as $column): ?>
<?php echo $column->getAdditionalHtml();?>
<?php endforeach; ?>
<script type="text/javascript">
//<![CDATA[
decorateTable('wishlist-table');
<?php foreach ($columns as $column): ?>
<?php echo $column->getJs();?>
<?php endforeach; ?>
//]]>
</script>
ADD SUBTOTAL COLUMN
Open app\design\frontend\rwd\default\layout\wishlist.xml and
Replace <wishlist_index_index>
tag with below code.
<wishlist_index_index translate="label">
<label>Customer My Account My Wishlist</label>
<!-- Mage_Wishlist -->
<update handle="customer_account" />
<reference name="my.account.wrapper">
<block type="wishlist/customer_wishlist" name="customer.wishlist" template="wishlist/view.phtml">
<action method="setTitle" translate="title">
<title>My Wishlist</title>
</action>
<block type="wishlist/customer_wishlist_items" name="customer.wishlist.items" as="items" template="wishlist/item/list.phtml">
<block type="wishlist/customer_wishlist_item_column_image" name="customer.wishlist.item.image" template="wishlist/item/column/image.phtml" />
<block type="wishlist/customer_wishlist_item_column_comment" name="customer.wishlist.item.info" template="wishlist/item/column/info.phtml">
<block type="wishlist/customer_wishlist_button" name="customer.wishlist.button.update" template="wishlist/button/update.phtml" />
</block>
<block type="wishlist/customer_wishlist_item_column_cart" name="customer.wishlist.item.quantity" template="wishlist/item/column/quantity.phtml">
<action method="setTitle" translate="title">
<title>Qty</title>
</action>
<block type="wishlist/customer_wishlist_item_options" name="customer.wishlist.item.options" />
</block>
<block type="wishlist/customer_wishlist_item_column_cart" name="customer.wishlist.item.price" template="wishlist/item/column/price.phtml">
<action method="setTitle" translate="title">
<title>Price</title>
</action>
<block type="wishlist/customer_wishlist_item_options" name="customer.wishlist.item.options" />
</block>
<block type="wishlist/customer_wishlist_item_column_cart" name="customer.wishlist.item.subtotal" template="wishlist/item/column/subtotal.phtml">
<action method="setTitle" translate="title">
<title>Sub Total</title>
</action>
<block type="wishlist/customer_wishlist_item_options" name="customer.wishlist.item.options" />
</block>
<block type="wishlist/customer_wishlist_item_column_cart" name="customer.wishlist.item.cart" template="wishlist/item/column/cart.phtml">
<block type="wishlist/customer_wishlist_item_options" name="customer.wishlist.item.options" />
</block>
<block type="wishlist/customer_wishlist_item_column_remove" name="customer.wishlist.item.remove" template="wishlist/item/column/remove.phtml" />
</block>
<block type="core/text_list" name="customer.wishlist.buttons" as="control_buttons">
<block type="wishlist/customer_wishlist_button" name="customer.wishlist.button.share" template="wishlist/button/share.phtml" />
<block type="wishlist/customer_wishlist_button" name="customer.wishlist.button.toCart" template="wishlist/button/tocart.phtml" />
<block type="wishlist/customer_wishlist_button" name="customer.wishlist.button.update" template="wishlist/button/update.phtml" />
</block>
</block>
</reference>
<reference name="right">
<action method="unsetChild"><name>wishlist_customer_sidebar</name></action>
</reference>
</wishlist_index_index>
Now create a new file app\design\frontend\rwd\default\template\wishlist\item\column\subtotal.phtml with below code.
<?php
$item = $this->getItem();
$product = $item->getProduct();
$options = $this->getChild('customer.wishlist.item.options')
->setItem($item)
->getConfiguredOptions();
$_product = $item->getProduct();
$_priceIncludingTax = Mage::helper('tax')->getPrice($_product, $_product->getFinalPrice());
$wishListTotal = $item->getQty() * $_priceIncludingTax;
?>
<div class="cart-cell">
<div class="price-box">
<span class="regular-price" id="product-price-<?php echo $item->getId(); ?>">
<span class="price"><?php echo Mage::helper('core')->currency($wishListTotal, true, false);?></span>
</span>
</div>
</div>