Jason Carter works for a producer of soaps that come in packages of 6 each. His job is to fill the packages with soap, and he is expected to process…

Jason Carter works for a producer of soaps that come in packages of 6 each. His job is to fill the packages with soap, and he is expected to process 20 packages an hour. The facility where Jason works uses a kanban production system in which each container holds 5 packages of soap. It takes 30 minutes to receive the packages he needs from the previous workstation. How many kanbans are needed for the filling process? (Round answer to 2 decimal places, e.g. 15.25.)