can someone help fix this formula to calculate total qty shipping


#1

can someone help please…
this php is to calculate shipping charges for paypal…
SHIPPING CHARGES RULES: ($7.00 FOR THE FIRST TWO ITEMS - $1.00 FOR EACH ADDITIONAL ITEM)
as is, the formula calculates the number of items - not total of quantity - adds $1 for each additional after 2.

FORM:

            <TD>Herbal Hair Rejuvenator, Unscented <FONT SIZE="-2">(4oz. jar)</FONT><input type="hidden" name="item_name_1" value="Herbal Hair Rejuvenator, Unscented (4oz. jar)" />                </TD>
            <TD align="center" id="table"><input name="quantity_1" type="text" value="" size="6" maxlength="2" /></TD>
            <TD align="center">$13.50<input type="hidden" name="amount_1" value="13.50" /></TD>

PHP:

<?php $products = array(); $url = "?business=*********$handling_cart=7.00"; foreach ($_POST as $k=>$v) { preg_match("/\_(\d{1,3})$/",$k,$match); $key = $match[1]; $products[$key][$k] = $v; } $i=1; foreach ($products as $k=>$v) { if ($v['quantity_'.$k] > 0) { foreach ($v as $k1=>$v1) { $key = explode("_",$k1); switch($key[0]) { case 'item': $var = "item_name_" . $i; break; case 'quantity': $var = "quantity_" . $i; break; case 'amount': $var = "amount_" . $i; break; } //get shipping for additional items above 3 if ($i <= 2) { $shipping = "0.00"; } else { $shipping = "1.00"; } $shipping = ($shipping * $v['quantity_' . $k]); $url .= "&" . $var . "=" . urlencode($v1); } $url .= "&shipping_" . $i . "=" . $shipping; $i++; } } #echo $url; header("Location: https://www.paypal.com/cgi-bin/webscr" . $url); exit; ?>