do_shipping()

function do_shipping($order_id = null) {
        global $wpdb, $wpcoDb, $wpcoShipmethod, $Item;

        if (empty($order_id)) {
            $order_id = $this -> current_order_id();
        }

        if ($this -> get_option('shippingcalc') == "Y") {
            $shipmethodsquery = "SELECT id FROM " . $wpdb -> prefix . $wpcoShipmethod -> table . "";

            if ($shipmethods = $wpdb -> get_results($shipmethodsquery)) {
                if (!empty($order_id)) {
                    $wpcoDb -> model = $Item -> model;

                    if ($items = $wpcoDb -> find_all(array('order_id' => $order_id))) {
                        foreach ($items as $item) {
                            if (!empty($item -> product -> type)) {
                                if ($item -> product -> type == "tangible") {
                                    return true;
                                }
                            }
                        }
                    }
                }
            }
        }

        return false;
    }