title: The text "Grand Total to be Charged" in Invoice Emails in Magento 1.7
body: <p>I have a requirement in Magento 1.7, My site has multiple currencies, Suppose I checkOut with GBP whereas my default currency is USD. Now, the Order email has the following texts</p>
  
  <pre><code>Grand Total                   £93.66
  Grand Total to be Charged    $169.70
  </code></pre>
  
  <p>Both the values are equal to each other with respect to their conversion value [todays's rate]. But when the Invoice mail is generated, the last line "Grand Total to be Charged" is not appearing. I need that line to appear on all other transaction emails including Invoice emails [ in cases of products being purchased in currency other than default currency ].</p>
  
  <p>How can I achieve that? Any help is highly appreciated.</p>