A JIT system uses kanban cards to authorize the movement of incoming parts. In one portion of the system, a work center uses an average of 111 parts per hour while running. The manager has assigned an inefficiency factor of .21 to the center. Standard containers are designed to hold 5 dozen parts each. The cycle time for parts containers is about 100 minutes.

How many containers are needed? (Round up your answer to the next whole number.)

Number of containers________.