Get the grand total in Magento shopping cart
<?php
$quote = Mage::getModel('checkout/session')->getQuote();
$quoteData= $quote->getData();
echo $grandTotal=$quoteData['grand_total'];
?>
OR
<?php echo Mage::helper('checkout')->formatPrice(Mage::getSingleton('checkout/session')->getQuote()->getgrandTotal(),2); ?>
