$totalDelivFee = 0;
do {
    switch ($sumWeight) {
        case ($sumWeight <= 2):
            $delivSize = 'size_60';
            $sumWeight -= 2;
            break;
        case ($sumWeight <= 5):
            $delivSize = 'size_80';
            $sumWeight -= 5;
            break;
        case ($sumWeight <= 10):
            $delivSize = 'size_100';
            $sumWeight -= 10;
            break;
        case ($sumWeight <= 15):
            $delivSize = 'size_120';
            $sumWeight -= 15;
            break;
        case ($sumWeight <= 20):
            $delivSize = 'size_140';
            $sumWeight -= 20;
            break;
        default:
            $delivSize = 'size_170';
            $sumWeight -= 30;
    }
    $arrRet= $objQuery->select($delivSize, 'dtb_delivfee', $where, array($deliv_id, $pref));
    $totalDelivFee += $arrRet[0][$delivSize];
} while ($sumWeight > 0);

class SC_Helper_DB_Ex extends SC_Helper_DB {
    
    function sfTotalConfirm($arrData, &$objPage, &$objCartSess, $arrInfo, $objCustomer = "") {
        
        $arrData['crg_pt'] = 0; // 送料点数合計
        foreach ($objCartSess->getCartList() as $arrCart) {
            
            // 送料点数取得
            $objQuery = new SC_Query();
            $col = "crg_pt";
            $table = "dtb_products_class";
            $where = "product_id = ? AND classcategory_id1 = ? AND classcategory_id2 = ?";
            list($product_id, $classcategory_id1, $classcategory_id2) = $arrCart['id'];
            if ($classcategory_id1 == "") $classcategory_id1 = '0';
            if ($classcategory_id2 == "") $classcategory_id2 = '0';
            $crg_pt = $objQuery->get($table, $col, $where, array($product_id, $classcategory_id1, $classcategory_id2));
            
            $arrData['crg_pt'] += $crg_pt * $arrCart['quantity'];
        }
        
        return SC_Helper_DB::sfTotalConfirm($arrData, $objPage, $objCartSess, $arrInfo, $objCustomer);
    }
    
    function sfGetDelivFee($arrData) {
        switch ($arrData['deliv_pref']) {
            case 13: // 東京都
                if ($arrData['crg_pt'] <= 100) return 500;
                if ($arrData['crg_pt'] <= 200) return 600;
                return 700;
            case 1:  // 北海道
            case 47: // 沖縄県
                if ($arrData['crg_pt'] <= 100) return 1000;
                if ($arrData['crg_pt'] <= 200) return 1200;
                return 1400;
            default: // 他
                if ($arrData['crg_pt'] <= 100) return 700;
                if ($arrData['crg_pt'] <= 200) return 800;
                return 900;
        }
    }
}