Mich. Comp. Laws § 445.102

Sec. 2. When used in this act: (a) The term "person" includes any individual, firm, co-partnership, joint adventure, association, municipal or private corporation whether organized for profit or not, company, estate, trust, or any other group or combination acting as a unit, and the plural as well as the singular number, unless the intention to give a more limited meaning is disclosed by the context. (b) The term "employer" includes any person acting directly or indirectly in the interest of an employer in relation to an employee. (c) "Sale" or "sell" includes any sale, exchange, contract to sell, consignment for sale, shipment for sale, or other disposition.