如何更改WooCommerce订单表中的总和？

Question

I'm trying to change the value of the Total field in the WooCommerce orders table:

I've got a function which checks some parameters. If these parameters are true, I need to set a custom value to the order like $50 instead of $60.

if ($is_valid == true) {
   //Change order value = $new_value;
}