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$dbBasketItems = CSaleBasket::GetList(
array(
"PRICE" => "DESC",
"NAME" => "ASC",
"ID" => "ASC"
),
array(
">=DATE_INSERT" => date($DB->DateFormatToPHP(CSite::GetDateFormat("SHORT")), mktime(0, 0, 0, date("n"), 1, date("Y"))),
"PRODUCT_ID"=>$PRODUCT_ID
),
false,
false,
array("ID", "NAME",  "QUANTITY")
);
  $sale_count=0;
while ($arItems = $dbBasketItems->GetNext())
{
      $sale_count+=  $arItems["QUANTITY"];
}