Price tag

A price tag is a label declaring the price of an item for sale. It may be a sticker or attached by twist tie or other means.
Some jurisdictions require items to be individually marked with the price, or have shelf tags or barcode scanners available so customers can determine prices without consulting store staff. In some cases, unit price is also required.
Some jurisdictions also outlaw price discrimination except for different quantities or different types of customers. For example, the 1936 Robinson–Patman Act outlaws this practice in the United States.
Many price tags also bear the name of the store.

History

Before the late 19th century, in most cases, retail goods did not have a fixed price, and each customer would be expected to haggle with the store clerk. The Quakers, who found it immoral for different customers to pay different prices were an exception.
Macy's in New York also began affixing physical tags to items in the 1870s, eliminating haggling. This allowed shorter training time for new clerks and allowed clerks to serve more customers.
Even large stores kept goods behind a counter, requiring clerks to fetch items for customers. The Piggly Wiggly chain of grocery stores was the first to become self-service in 1916, further cementing the need for price tags. Price tags soon became commonplace in Western retail stores, and haggling rare outside of proprietors and individuals selling used items.