title: Accessing shipping cost in Magento's cart and/or checkout
body: <p>Please note, this question is regarding the shipping cost, not price.  There is an important difference, i.e. what $$ charge the shipping method incurs for the store owner, as opposed to what is $$ charge is paid by the customer. </p>
  
  <p>The <code>shipping_tablerate</code> database table includes a <code>cost</code> field, which is populated in the <code>Mage_Shipping_Model_Carrier_Tablerate</code> object during the <code>collectRates</code> method.  However, that field is not accessible anywhere else in the stack, e.g. from a quote's address.  </p>
  
  <p>I need to access that value on the cart page, and I can't find anyway to achieve it, other than to instantiate a <code>Mage_Shipping_Model_Rate_Request</code> object to pass into <code>collectRates()</code>.  That seems unnecessarily inefficient given that the data is already loaded from the table and should be accessible.  </p>
  
  <p>I have tried Observing the <code>&lt;shipping_carrier_tablerate_load/&gt;</code> event, but it seems that the <code>_load</code> event is not thrown for that model.  </p>
  
  <p>I have also tried accessing the rate from the quote: </p>
  
  <pre><code>$quote = Mage::getSingleton('checkout/cart')-&gt;getQuote();
  $address = $quote-&gt;getShippingAddress();
  $rate = $address-&gt;getShippingRateByCode($code ='tablerate_bestway');
  </code></pre>
  
  <p>I can see the calculated <code>price</code>, however <code>cost</code> is not present in that model.</p>
  
  <p>At this stage, I'm running out of ideas.  Any suggestions gratefully received!</p>
  
  <p>Thanks,
  Jonathan</p>