Commerce - Paid delivery when sum < N

PaidDelivery.tpl

$title = 'Доставка курьером';
$price = ci()->currency->convertToActive(100);

switch ($modx->Event->name) {
    case 'OnRegisterDelivery': {
        $params['rows']['fixed'] = [
            'title' => $title,
            'price' => $price,
        ];
		$params['rows']['sam'] = [
            'title' => "Самовывоз",
            'price' => ci()->currency->convertToActive(0),
        ];
        break;
    }

    case 'OnCollectSubtotals': {
		$processor = $modx->commerce->loadProcessor();
		if ($processor->getCurrentDelivery() == 'fixed' && intval($params['total']) < 350) {
			$params['total'] += $price;
			$params['rows']['fixed'] = [
				'title' => $title,
				'price' => $price,
			];
		}
        break;
    }
}