The four different alternative types of B2B exchanges that are dependent on the type of purchasing and what is purchased

There are four alternative types of B2B exchanges that are dependant on what businesses buy and how they buy the products or services. Companies have different needs for the products and services they buy, and as a result, the types of business-to-business exchanges they use will vary as well. . . .

This article addresses: The four different alternative types of B2B exchanges that are dependent on the type of purchasing and what is purchased. Give one example of a product that could be purchased at each, and the name of an exchange offering this service. DIAGRAM provided.