I have redirected and forwarded your question to one of our staff members on the website. She will get back to you with a proper and suitable answer to your problem as soon as possible. Thank you! :]
Sorry for the confusion here! The extra amount added is VAT. In the US prices are typically listed before any tax is added. I know that in some other countries this is not the case, but for us the price listed doesn’t include VAT. The reason you are being asked to pay more at check out is because the VAT is then added depending on what country you are ordering from.
If you are purchasing for your company and want to know how to enter your company VAT ID so you are not charged VAT at time of purchase, I’ve provided instructions here: Where can I enter my VAT number?
I hope this helps! Please let me know if you have any more questions. :]