Livernonions Industries uses a kanban system to manage production of the BR-549 subassembly. In an eight-hour day, they use 1200 units and use containers that can hold 50 units each. It takes 120 minutes to fill and move a container of parts to the right place on the BR-549 line that is currently rated at a 25% safety factor. How many production hours of inventory are needed?

Group of answer choices

1. 375
2. 2.4
3. 2.5
4. 7.5