BO 1.7.6.5 Orders view - Add column price tax excluded without shipping price

[Acxel]

In the backoffice of Prestashop 1.7.6.5, I would like add a new column "Net price" to order list, for me "Net price" means: Price tax excluded without shipping cost.

I think it means to add a formula at some point, I found how to display shipping price but i don't know how to modify it to display the net price :

in file: controllers/admin/AdminOrdersControler.php add under (line about 110): $this->fields_list = array_merge($this->fields_list, array(

add this code:

 

'total_shipping' => array( 'title' => $this->l('Shipping'), 'filter_key' => 'a!total_shipping', 'type' => 'price', 'currency' => true, 'callback' => 'setOrderCurrency' ),

and add above line 200: public static function setOrderCurrency($echo, $tr)

add this code:

public function displayTotal_shipping($value) { return Tools::ps_round($value, 0); }

Source: https://stackoverflow.com/questions/59275761/how-add-column-shipping-cost-to-order-list-in-prestashop-1-7

Thanks in advance if you can help me!