Concatenate Two fields

Hello

1) please, use >Setup Fields>Shipping>Full Name

2) please, follow to https://docs.algolplus.com/algol_order_export/fields/
add field total_weight
use this code

add_filter('woe_get_order_value_total_weight',function ($value, $order,$fieldname) {
$pairs = ceil(  $order->get_item_count() / 2 );
$value = 0.5 + 0.5 * $pairs;
return $value;
},10,3);