Shipping is automatically calculated when you submit your shipping address when placing an order. It depends on your location, weight of the item and your preferred shipping method. You will be able to see the shipping cost prior to submitting your payment information.
Yes, Shipping depends upon the locality as well. But I found a medical courier Dallas service that sometimes offer free shipping. They probably run deals online and I always get the benefit of it. I have been using their service for more than a year now and I don’t feel like switching to any other.