OFOI items are shown so the trades can leave space and services for them. Furniture and movable equipment are often OFOI.
Example: a gym plan shows portable volleyball standards marked OFOI. The equipment bidder leaves them out. Floor sleeves for them may still be in the contract.
Leave OFOI items out of your price and list them as exclusions. Then look for the supporting work that stays in the contract, such as sleeves, blocking, power and data. Read the schedule notes, because the same schedule can mix OFOI, OFCI and contractor furnished items.