Bods Electric Motors uses a Kanban system to manufacture motors for several garage door companies in the Midwest of United States. The daily demand for motor housings used in manufacturing is 130 units. The average waiting time for a container of parts is 0.4 day. The processing time for a container of housings is 0.2 day, and a container holds 5 housings. If Jones wishes to use a 20% policy variable, how many containers are needed? (round normally to the closest integer)