bug fix for ndiscode

ts.php

             $tos_total = $val * $price->get_tos_price($key);
             $response['overall_total'] += $tos_total;
             $response['summary'][] = array(
-                'ndis' => $key,
+                'ndis' => $price->get_tos_ndis_code($key),
                 'tos' =>  $price->get_tos_full_str($key),
                 'unitprice'=> $unitprice,
                 'Hours'=> sprintf("%0.2f", $val),