Magento Checkout Success Page - Order Details, Product Price, SKU retrival

<?php
    $_customerId = Mage::getSingleton('customer/session')->getCustomerId();
    $lastOrderId = Mage::getSingleton('checkout/session')->getLastOrderId();
    $order = Mage::getSingleton('sales/order'); 
    $order->load($lastOrderId);
    $_totalData =$order->getData(); 
    $_sub = $_totalData['subtotal'];
    //USD ==> global_currency_code,base_currency_code order_currency_code
 
    //print_r($order); print_r($_totalData);
 
    $_order   = $this->getOrder();
    $allitems = $order->getAllItems();
    $index    = 1;
    $data   = "";//Needed format ==> &ITEM1=3214sku&AMT1=13.49&QTY1=1&ITEM2=6577sku&AMT2=7.99&QTY2=2&
    foreach($allitems as $item)
    {
      $cjData.="&ITEM".$index."=".$item->getSku()."&AMT".$index."=".$item->getPrice()."&QTY".$index."=".$item->getQtyToShip();
      $index++;
    }
?>