/**
* calculate and return delivery price
*
* @param Country $country
* @throws \Exception
*
* @return mixed
*/
public function getPostage(Country $country)
{
if ($country !== null && $country->getArea() !== null) {
$postage = $country->getArea()->getPostage();
} else {
throw new \InvalidArgumentException("Country or Area should not be null");
}
return $postage === null ? 0 : $postage;
}
