Answer:
d. six or seven
Explanation:
Given that:
Daily demand for the grip = 3000 units
average waiting time = 0.20 day
processing time = Â 0.10 day / container
a container holds  = 150 grips
percentage of policy used = 10% = 0.10
The  objective of this question is to determine the amount of Kanban containers would Jewel require.
the amount of Kanban containers  = Demand ( wasting time + processing time)(1+percentage policy)/ amount of container holding
the amount of Kanban containers  = 3000( 0.2 + 0.1) ( 1+ 0.10)/ 150
the amount of Kanban containers  =  3000 ( 0.30) (1.10)/150
the amount of Kanban containers  =  990/150
the amount of Kanban containers  = 6.6
SO we can infer that the amount of Kanban containers would Jewel require if a 10% policy variable is used falls within the range of  six or seven.