<?php /* Use this code anywhere in your theme's PHP file(s) to display a shopping cart link with number of items in the cart*/ ?>
<?php if (class_exists('wpCheckout')) { $wpCheckout = new wpCheckout(); }; ?>
<?php global $wpcoHtml, $Item, $Order; ?>
<?php $number_items = $Item -> item_count($Order -> current_order_id(), "items"); //you can change "items" to "units" to display number of units ?>

<?php if (!empty($number_items)) : ?>
    <a href="<?php echo $wpcoHtml -> cart_url(); ?>" title="Shopping Cart">Shopping Cart (<?php echo $number_items; ?>)</a>
<?php endif; ?>