public function getDefaultValues()
    {
        preg_match('/([0-9.]+)([A-Z]{3})/', $this->config['price'], $matches);

        $this->defaults['price'] = array(
            'currency' => (!empty($this->defaults['price']['currency']) ? $this->defaults['price']['currency'] : $matches[2]),
            'amount' => (!empty($this->defaults['price']['amount']) ? $this->defaults['price']['amount'] : $matches[1]),
            'vat' => (!empty($this->defaults['price']['vat']) ? $this->defaults['price']['vat'] : null),
        );

        return $this->defaults;
    }