Smh (hard smacking my head right now). It's because the network is located somewhere in America. It says in the store, it's currency is USD. But if you want to change Euros into USD, it'll be either less or more because of the global economic system. This is caused by wars, battles, printing of money etc. If it costs more then the other day, means most likely inflation has gotten it.
If you want to know how much Euros can exchange for, here's the Goggle equivalent of a money exchanger.
Hey @Your_daily_doge,
When purchasing cubits yes there is a conversation rate from your initial currency and any fees that are with that you also have to pay whatever your taxes are for that product (price depends on where you are located in the world depending on your government taxes)
If you have any questions or concerns, please do not hesitate to reach out to me on the forums or discord (nick22985)