как вывести сумму заказа в «краткой» корзине? (в формате «В Вашей корзине 3 товара на 3000 руб»)

Редактируем шаблон,  меняем на это

<?if (!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();?>

<table>
   <?
   if (IntVal($arResult["NUM_PRODUCTS"])>0)
   {

      if (CModule::IncludeModule("sale"))
      {

         $arBasketItems = array();

         $dbBasketItems = CSaleBasket::GetList(
                 array(
                         "NAME" => "ASC",
                         "ID" => "ASC"
                     ),
                 array(
                         "FUSER_ID" => CSaleBasket::GetBasketUserID(),
                         "LID" => SITE_ID,
                         "ORDER_ID" => "NULL"
                     ),
                 false,
                 false,
                 array("ID", "QUANTITY", "PRICE")
             );
         while ($arItems = $dbBasketItems->Fetch())
         {
             if (strlen($arItems["CALLBACK_FUNC"]) > 0)
             {
                 CSaleBasket::UpdatePrice($arItems["ID"], 
                                          $arItems["QUANTITY"]);
                 $arItems = CSaleBasket::GetByID($arItems["ID"]);
             }

             $arBasketItems[] = $arItems;
         }

         $summ = 0;

         for ($i=0;$i<=$arResult["NUM_PRODUCTS"];$i++){      

            $summ = $summ + $arBasketItems[$i]["PRICE"]*$arBasketItems[$i]["QUANTITY"];

         }

      }

      ?>

      <tr>
         <td><a href="<?=$arParams["PATH_TO_BASKET"]?>"></a></td>
         <td style="font-size:80%"><a href="<?=$arParams["PATH_TO_BASKET"]?>"><?=$arResult["PRODUCTS"];?> на сумму <?=$summ?> руб.</a></td>
      </tr>
      <?
   }
   else
   {
      ?><tr>
         <td><div></div></td>
         <td><?=$arResult["ERROR_MESSAGE"]?></td>
      </tr><?
   }
   if($arParams["SHOW_PERSONAL_LINK"] == "Y")
   {
      ?>
      <tr>
         <td><a href="<?=$arParams["PATH_TO_PERSONAL"]?>"></a></td>
         <td><a href="<?=$arParams["PATH_TO_PERSONAL"]?>"><?= GetMessage("TSB1_PERSONAL") ?></a></td>
      </tr>
      <?
   }
   ?>
</table>