Thank you for your purchase. Please look over the invoice closely. The shipping cost was calculated on approximate weight and dimensions of your product. The actual shipping cost can vary from this estimate by as much as 100% depending on the weight and size of your item. Please remember that shipping your item safely involves more than just the postage cost. Boxes, bubble wrap, foam, peanuts, labor, tape, ink, labels, and transportation all adds additional cost to the basic shipping rate.