How to add shipping cost in custom rsformpro ? I want to add shipping cost when customer order is less than 5 If greater than 5 no shipping cost. I have tried but bad luck I haven't got the result
Please help me.

Thank you very much

Here is the paypal script.

if($_POST != '0')
{
$business = ' This e-mail address is being protected from spambots. You need JavaScript enabled to view it ';
$item_name = 'Products';
$currency_code = 'USD';
$undefined_quantity=1;
$amount = $_POST;
$return = 'www.mysite.com/';
header('Location: www.paypal.com/cgi-bin/webscr?cmd=_xclic...y.'&return='.$return); exit();
}