case 15:
        if ($model->updateReservation($_POST)) {
            echo '1';
        } else {
            echo '0';
        }
        break;
    case 16:
        if ($paidStaying = $model->getReservationStayingCostPaid($_POST['reservationId'])) {
            echo '$ ' . $paidStaying;
        } else {
            echo '$ 0';
        }
        break;
    case 17:
        if ($pendingStaying = $model->getReservationStayingPending($_POST['reservationId'])) {
            echo '$ ' . $pendingStaying;
        } else {
            echo '$ 0';
        }
        break;
    case 18:
        if ($grandTotalStaying = $model->getReservationStayingCostTotal($_POST['reservationId'])) {
            echo '$ ' . $grandTotalStaying;
        } else {
            echo '$ 0';
        }
        break;
    default:
        break;
}