Robert produces 500 units of a product per hour and 25 units are needed to fill a container. It takes 15 minutes to receive the materials needed from the previous workstation. The company currently uses a safety stock of 10 percent. Determine the number of kanbans needed between Robert's station and the previous process. (Round answer to 2 decimal places, e.g. 15.25.)
Kanban(s) ___________ needed