3. An auto parts supplier sells Hardy-brain batteries to car dealers and auto mechanics. The annual demand is approximately 1,200 batteries. The supplier pays RM50 for each battery and estimates that the annual holding cost is 30 percent per annum. It costs a RM40 to place an order. The supplier currently orders 100 batteries per month. Required: a) Determine the economic order quantity (EOQ). b) Compute the ordering, holding, and total inventory costs for the EO