Rubber band is careful in controlling their material used for making its only product called getah rambut. Following are the information related to the material purchased in past: Usage per day in the production department: 500 kg to 700 kg Lead time taken to receive the purchased order: 5 to 9 days Reorder quantity: 15,000 kg a) The reorder level is kg b) The minimum stock level is c) The maximum stock level is kg kg