Do they add a tax on pricing for other countries outside of the US ?

I don't know if they add a tax on the pricing, I recently wanted to buy the program for $99 . Which at the time was, with my country's exchange rate was about R1683 but when I tried going through the pay wall it gives me a pricing of R2853.68 ???

Is this because of a hidden tax they add? or am I just confused on something?
If someone could assist it would be appreciated.

 

This was with South African Rands

 

Hello, please let us know which Parallels Desktop for Mac Edition you are trying to purchase so that we can check this further. Thanks.

 

Parallels Desktop standard edition for Mac, for home and student use...