Answer: Because prices all goods and services must be expressed in terms of each other
Explanation:
Barter system is an exchange system that was used in the olden days before people started using money. It is a system whereby goods and services were exchanged for other goods and services.
Under a barter system, increasing the number of products available results in a much faster increase in the number of prices because prices all goods and services must be expressed in terms of each other.
