Hi, I am creating an order form where I have a subtotal and then the shipping charges are dependant upon the subtotal. How do I script this so that, say for instance, my subtotal is 43.00 and the shipping charges for orders between 0 and $49.99 are $10.00. Also, how do I add surcharge ($15.00) if only 1 item is placed and if a residential address is used (checkbox) ($3.00). I have everything else completed but this. Can someone help me please? URGENT