Berlin Industries Uses a Kanban System to Manage Production of the R-15

Multiple Choice

Berlin Industries uses a kanban system to manage production of the R-15 subassembly. They have an hourly demand for 250 units and use containers that can hold 50 parts each. It takes 90 minutes to fill and move a container of parts to the right place on the R-15 line that is currently rated at a 20% safety factor.
-If demand is expected to be double the rate planned earlier and with 18 containers, what will be the maximum inventory, all else being constant?

A) 450 units
B) 900 units
C) 2,500 units
D) 5,000 units
E) 75 units