anchor.diff:        <% end %>
       </tbody>
       <tbody id="summary-order-credits">
  -      <% @order.credits.each do |credit| %>
  +      <% @checkout.order.credits.each do |credit| %>
           <tr>
             <td><%= credit.description %>: </td>
             <td>(<%= number_to_currency credit.amount %>)</td>
  
positive.code:     </tbody>
      <tr>
        <td><strong><%= t('order_total') %>:</strong></td>
        <td><strong><span id='summary-order-total'><%= number_to_currency @order.total %></span></strong></td>
      </tr>
    </tbody>
  </table>
  
negative.code:   <tbody>
      <tr>
        <td><strong><%= t('item_total') %>:</strong></td>
        <td><strong><%= number_to_currency @checkout.order.item_total %></strong></td>
      </tr>
      <tbody id="summary-order-charges">
        <% @checkout.order.charges.each do |charge| %>
          <tr>
            <td><%= charge.description %>: </td>
            <td><%= number_to_currency charge.amount -%></td>
  