I received emails from Magix to upgrade my DP16 version for what appeared to be $99 but failed to notice that it was in fact 99GBP and therefore my American Express card was charged about $139 plus $4 foreign transaction fee. Yes, it was my fault for not noticing the pound sign. Because I had previously upgraded several times and it had always been in US dollars I guess I must have assumed that would be the same, as I am in the US. Strange, as Magix is based in Germany and not UK.
I am posting this just to remind people to check the prefix symbol in front of the numbers.