Getting client currency and markup values

get_client_details.php

<?php

require_once '../../csrest_clients.php';

$wrap = new CS_REST_Clients('Your clients ID', 'Your API Key');
$result = $wrap->get();

echo "Result of GET /api/v3/clients/{id}\n<br />";
if($result->was_successful()) {
    echo "Got client";
    $billingDetails = $result->response->BillingDetails;

    $currency = $billingDetails->Currency;
    $markupPerRecipient = $billingDetails->MarkupPerRecipient;

    echo '<br />Currency: '.$currency.'<br />Markup: '.$markupPerRecipient;
} else {
    echo 'Failed with code '.$result->http_status_code."\n<br /><pre>";
    var_dump($result->response);
}
echo '</pre>';