Robert produces 300 units of a product per hour and 30 units are needed to fill a container. It takes fifteen minutes to receive the materials needed from the previous workstation. The company currently uses a safety stock of 10 percent. Determine how the number of kanbans and the inventory level will be affected if the time required for Robert to receive the material increases to thirty minutes. (Round answer to 1 decimal place, e.g. 15.2.)