Megan is asked to produce 100 iPads an hour. It takes 30 minutes to receive the necessary components

Megan is asked to produce 100 iPads an hour. It takes 30 minutes to receive the necessary components from the previous workstation. Each output container holds 20 iPads. The facility currently works with a safety factor of 20 percent. How many kanbans should be circulating between Megan s process and the previous process?