private function checkDefaults($options)
	{
		if(!isset($options['request_option']))
		{
			$options['request_option'] = 'Shop';
		}
		if(!isset($options['from_country']))
		{
			$options['from_country'] = 'US';
		}
		if(!isset($options['to_country']))
		{
			$options['to_country'] = 'US';
		}
		if(!isset($options['service_type']))
		{
			$options['service_type'] = '03';
		}
		if(!isset($options['from_state']))
		{
			$options['from_state'] = '';
		}
		if(!isset($options['to_state']))
		{
			$options['to_state'] = '';
		}

		$this->commercial_rates = (isset($options['commercial']) && $options['commercial']) ? true : false;

		$this->negotiated_rates = (isset($options['negotiated_rates']) && $options['negotiated_rates']) ? true : false;
			
		return $options;
	}