As a European, seeing 1.5 USD for a donut, having the cash ready, and then learning that I have to pay 1.78 because there is a hidden tax different everywhere i

As a European, seeing 1.5 USD for a donut, having the cash ready, and then learning that I have to pay 1.78 because there is a hidden tax different everywhere is ridiculous. Gone the advantage of having 1.5 ready, I need to look for the ... euuhhh ... 28 cents, or give a 2 and wait for the .... euuuhhhh ... 22 cents back. At least here when I see 18 € for a meal, I know that this is 18 €. Not 18 + some tax + some tip = holly molly, this is an expensive meal!