What complicates things is that every state is different, so price tags never include the taxes.

复杂的是每一个州的税率各不相同，所以那些商品的标价都是不含税的。

youdao

Yet in just about every other aspect of our commercial lives the price of things is known.

FORBES: Magazine Article

The price of things that you might buy every day such as bread or milk is more important than something you might buy less than once a month such as a haircut.

BBC: Inflation calculator: How does it work?