A system for tracking the quantity of an item is disclosed. The system includes a portable terminal, a client, and a cabinet. The portable terminal is configured to receive information indicating a change in the quantity of the item in a container. The portable terminal includes a unique identifier, an input device configured to be actuated to indicate the change in the quantity of the item in the container, and a transceiver configured to transmit the information indicating. The client is configured to associate the portable terminal with the item based on the unique identifier, and includes a transceiver configured to receive and transmit the information. The cabinet includes the container and a controller configured to change a value indicating a quantity of the item based on the information transmitted from the client. A method for tracking the quantity of an item is also provided.