title: What are the default observers of checkout_cart_product_add_after?
body: <p>I am new to Magento.</p>
  
  <p>I am modifying the prices in <code>reloadPrice()</code> method of <code>options.phtml</code>.
  But they do not reflect in the cart after "Add to Cart"</p>
  
  <p>I looked around and learnt that I need to observe the <code>checkout_cart_product_add_after</code> event and do the price modifications there to get the correct prices in the cart.</p>
  
  <p>However, in my code base I was not able to find any observer to <code>checkout_cart_product_add_after</code> event. Also the functions from where <code>checkout_cart_product_add_after</code> is fired(in class <code>Mage_Checkout_Model_Cart</code>) doesn't seem to be called. </p>
  
  <p>What am I missing?</p>