Use this scenario, identify all of the possible entity types which could be stored in a database. Then, indicate those that probably wouldn't be actually used, and explain why.

An ITEM is supplied by one SUPPLIER; a SUPPLIER can supply multiple ITEMs. Some ITEMs are created by the store, and don't have a SUPPLIER.

A STORE sells many ITEMs. An ITEM could be sold at many STOREs.

A STORE can receive from multiple SUPPLIERs. Each SUPPLIER can provide for multiple STOREs