How to pass the shipping cost to the order from the CDEK widget?

Question

1C-Bitrix

How to pass the shipping cost to the order from the widget?
And what would the shipping cost be added to the total cost?

$shipmentCollection = $order->getShipmentCollection();
  $shipment = $shipmentCollection->createItem();

  $shipment->setFields(array(
    'DELIVERY_ID' => $delivery_id['ID'],
    'DELIVERY_NAME' => $delivery_id['NAME'],
    'CURRENCY' => $order->getCurrency(),
    ));

But nowhere is there an opportunity to indicate the cost that I receive from the order form ....
Because from there I just receive the delivery amount .... But I don’t understand how to transfer it to the order .....