A medieval knight could not go to the armor maker and pick out a size 44 long suit of armor to protect him in battle. Nor could a person living in the middle ages go to the cobbler and get a pair of shoes in a few minutes. This period before the advent of marketing is known as the .

Hubert manages a grocery store in a country experiencing a high rate of inflation. to keep up with inflation, he spends a lot of time every day updating the prices, printing new price tags, and sending out newspaper inserts advertising the new prices. his employees regularly deal with customer annoyance over the frequent price changes. this is an example of the of inflation.