title: shipping costs showing in minus
body: <p>I am using magento community 1.7.2 , I have setup a flat rate for shipping in backend at £3.95. </p>
  
  <p>But in the cart the prices shown in minus (-3.95) 
  e.g.</p>
  
  <p>Subtotal    £35.40
  Shipping &amp; Handling (Delivery Charges - 3.95)
  Grand Total     £35.40</p>
  
  <p>I would like to add £3.95 to grand total, Any help will be much appreciated. Thank you.</p>