Final answer:
The new dentist chair Tommy installed in the tattoo parlor is classified as a trade fixture, which is necessary for Tommy's business and can typically be removed upon vacating the premises.
Step-by-step explanation:
When Tommy the Tenant replaced the old dentist chair in the tattoo parlor with a new one he found at a flea market, the new chair is most accurately classified as a trade fixture. A trade fixture is an item installed by a tenant that is necessary for their business. In commercial tenancies, tenants are often allowed to install trade fixtures and may have the right to remove them upon leaving the premises, as long as the property is restored to its original condition. This new chair, although purchased second-hand and personal to Tommy’s business, would still be considered a trade fixture because it’s a piece of equipment necessary for running the tattoo parlor and it replaces an existing item used specifically for business purposes.