Copenhagen Industries Uses a Kanban System to Manage Production of Their

Multiple Choice

Copenhagen Industries uses a kanban system to manage production of their subassembly. In a 10-hour day, they use 1,500 units and use containers that can hold 50 units each. It takes 45 minutes to fill and move a container of parts to the right place on the subassembly line that is currently rated at a 15% safety factor.
-If the required round-trip time is changed to 1 hour, how many containers should the lean system be using, all else being constant?

A) 15
B) 20
C) 10
D) 9
E) 5