"In the United States, a group purchasing organization (GPO) is an entity that is created to leverage the purchasing power of a group of businesses to obtain discounts from vendors based on the collective buying power of the GPO members.
Many GPOs are funded by administrative fees that are paid by the vendors that GPOs oversee. Some GPOs are funded by fees paid by the buying members. Some GPOs are funded by a combination of both of these methods. These fees can be set as a percentage of the purchase or set as an annual flat rate. Some GPOs set mandatory participation levels for their members, while others are completely voluntary. Members participate based on their purchasing needs and their level of confidence in what should be competitive pricing negotiated by their GPOs." - (en.wikipedia.org 05.08.2022)
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