DevKen Cart Calculator Class

// create a Cart_Calculator object
$Cart_Calculator= new Cart_Calculator(array(
    'shipping' => 10.53, // overall shipping cost
    'handling' => 12.50, // overall handling charge
    'tax' => 6.5, // tax added to items not already taxed
    'discount' => '5%',  // discount added to items not already discounted
    'prefix' => '$' // prefix for returned values
));

// Create an example cart (3 things are required ['title'],['price'] and ['qty'])
$cart[0]['title'] = 'Product 1';    
$cart[0]['price'] = 12.99;
$cart[0]['qty'] = 3;
$cart[1]['title'] = 'Product 2';
$cart[1]['price'] = 25.50;
$cart[1]['qty'] = 9;
$cart[1]['discount'] =5.50;
$cart[1]['tax'] = 3.5;
$cart[1]['handling'] = 2.50;

// send the cart to the register for calculating
list($cart,$totals) = $Cart_Calculator->getTotals($cart);

// if integrating with Cart class use this format
// list($cart,$totals) = $Cart_Calculator->getTotals($CartObj->getCart);

// print the updated cart for viewing
print_r($cart); 

// print the totals array for viewing
print_r($totals); // cart totals