Ceny s DPH v emailu

Ahoj,
prosim o pomoc. Mam 1.4.8. Zakaznik udela objednavku a prijde mu potvrzujici email se soupisem zbozi. U zbozi jsou ceny bez DPH. Potrebuji zmenit na ceny s DPH. V /catalog/view/theme/muj/template/mail/order_confirm.tpl tato cast:
<td align="left"> <?php echo $product['model']; ?></td>
<td align="right"><?php echo $product['price']; ?></td>
<td align="right"><?php echo $product['quantity']; ?></td>
<td align="right"><?php echo $product['total']; ?></td>
vytvori v emailu soupis zbozi s cenou za kus a celkovou cenou. Potrebuju zjistit odkud se bere $product['price'] a $product['total'] a jak upravit na ceny s DPH. Poradi nekdo? Diky.

/catalog/model/checkout/order.php

$template->data['products'][] = array(
'name' => $product['name'],
'model' => $product['model'],
'option' => $option_data,
'quantity' => $product['quantity'],
'price' => $this->currency->format($product['price'], $order_query->row['currency'], $order_query->row['value']),
'total' => $this->currency->format($product['total'], $order_query->row['currency'], $order_query->row['value'])
);