add custom column woocommerce

/**
 * Add custom column (Custo) to shop_order post type
 */
 
function add_custom_column_to_wc_orders_list($columns){
    $new_columns = (is_array($columns)) ? $columns : array();
    $new_columns['wc_cog_order_total_cost'] = __('Custo');
    return $new_columns;
}
add_filter('manage_edit-shop_order_columns', 'add_custom_column_to_wc_orders_list');

/**
 * Add custom value to custom column in shop_order post type
 *
 * @return 	void
 */
function add_custom_column_value_to_wc_orders_list($column){
    global $post;
    if($column == 'wc_cog_order_total_cost'){    
        echo null !== get_post_meta($post->ID, 'wc_cog_order_total_cost', true) ? get_post_meta($post->ID, 'wc_cog_order_total_cost', true) : '';
    }
}
add_action('manage_shop_order_posts_custom_column', 'add_custom_column_value_to_wc_orders_list', 2);