function find_last_order($json_json) {
		$json_assoc = json_decode($json_json);
		$variables = get_object_vars($json_assoc);
		$sets = array_keys($variables);
		$set = $sets[1];
		$sales = $variables[$set][0];
		$sale = get_object_vars($sales);
		$last_order = $sale['internal_code'];
		return $last_order;
	}