title: Magento Tax calculation added twice on cart page
body: <p>I am suffering with tax calculation. Here i set "<strong>Tax Calculation Method Based On</strong>" is "Unit price" in <code>System -&gt; Configuration -&gt; Sales -&gt; Tax</code>.</p>
  
  <p>So price included tax is display for product on product detail page. So when i add product into cart, product is added with included tax. but on cart page again it adds tax in subtotal. </p>
  
  <p>So tax is added twice at</p>
  
  <ol>
  <li>On product details page</li>
  <li>On cart subtotal</li>
  </ol>
  
  <p>I don't know what wrong with this. please Help.  </p>