title: Overriding Magento Sub Total and Adding New Row in Admin Invoice Email
body: <p>I would like to add new row after Sub total in Magento Invoice Email. Can any one point out me to which Right core file for Invoice Email rewrite?</p>
  
  <p>I have tried to find the file in Magento Core files for Invoice Email new row add after the Sub Total but I don't know the right path and file name in Magento Core Folder.</p>