if($qty>1)
{
$_SESSION[‘shipping_rate’]=3+(($qty-1)*(2.25));
}
else
{
$_SESSION[‘shipping_rate’]=3;
}
i would like to expand the if statement to multiple level of qty to added shipping extra charge
now it adds 2.25 to each qty of product over 1 item
i would like to scale it up to
if qty=2 add 2.25
if qty=3 add 2.20
if qty=4 add 2.10
if qty>5 multiply ship rate * .25
thank you