If you want to change your shopping cart display like number of item and price ,

i give sample image show ,

Cart in menu bar

<div class="mybag">

<a href="<?php echo $this->getUrl('checkout/cart')?>">

<span class="mybag-text">Shopping Cart:</span>

<?php $cartcnt= Mage::helper('checkout/cart')->getItemsCount();?>

<?php if($cartcnt==0):?>

<span class="empty-bag"><?php echo '0 items,';?>

<?php echo $this->helper('checkout')->formatPrice(Mage::getSingleton('checkout/cart')->getQuote()->getGrandTotal()); ?>

</span>

<?php else:?>

<span class="bag-item">

<?php echo $cartcnt.' '.'items,';?><?php echo $this->helper('checkout')->formatPrice(Mage::getSingleton('checkout/cart')->getQuote()->getGrandTotal()); ?></span>

<?php endif; ?>

</a>

</span>

</div>