How is shipping cost calculated?

Related Questions:

1. What should I do if the carrier’s tracking website states my order has been delivered but I have not received it?
2. Do you ship internationally?
3. What are the shipping destination options?
4. What are the shipping methods used for SeeScan orders?
5. What are your business days for shipping?
6. Where do I recycle my battery pack?
7. What should I do if I receive a damaged item?
8. What forms of payment are accepted?
9. Who can I contact if I want to cancel, modify, or ask a question about my order?
10. How long does shipping normally take?
11. How do I view and print my online order confirmation?
12. Are there additional costs or fees I should be aware of?
13. How can I track my order?