Packers, Inc., bought a new kind of refrigeration system from Coolit for storage of its meats. As part of the contract, Coolit delivered the refrigeration system to the Packers plant, installed it, set its temperature, and then monitored it for several hours to make sure it worked.

Packers, Inc., received title to the refrigeration system when:

1) the system was delivered to the plant.

2) it paid for the system prior to its delivery.

3) the system was delivered, installed, and tested.

4) it signed the sales contract.