Hello. I am new at the shopping cart and don't completely understand the shipping settings. I want to charge my shipping based solely by weight. The amounts are less than 21 lbs = $10, 21lbs - 41 lbs = $15, and more than 41 lbs = $20. I have one item that is a gift certificate and has a shipping charge of $3 regardless of its weight and amount purchased. I was wondering if you could tell me what I need to put in the Custom Shipping Logic section?
Also I want to only ship by USPS. What is the username and password that it is asking for, and where do I go to register?
Thanks in advance. I really appreciate your help.