Fortnox AdministrativeFee

functions.php

<?php
/**
* @snippet WooCommerce - Fortnox plugin by Redlight Media - Add fee to AdministrativeFee via functions.php
* @author Redlight Media AB / Christopher Hedqvist
* @compatible WooCommerce 3.2.5
*/
function redlight_fortnox_administrative_fee( $orderData, $order_id ) {
        // Get the total fees of this order
        $order = wc_get_order($order_id);
        $fees = $order->get_fees();
        $total_fees = 0;
        foreach( $fees as $fee ){
                $total_fees += $fee->get_total();            
        }
    $orderData['Order']['AdministrationFee'] = $total_fees;
return $orderData;
}
add_filter('obj_fortnox_order_data', 'redlight_fortnox_administrative_fee', 10, 2 );