W Ltd is a retailer of beer barrels. The company has an annual demand of 36,750 barrels. The barrels cost $12 each. Fresh supplies can be obtained immediately, but ordering costs and the cost of carriage inwards are $200 per order. The annual cost of holding one barrel in inventory is estimated to be $1.20. The economic order quantity ha been calculated to be 3,500 barrels. The suppliers introduce a quantity discount of 2% on orders of at least 5,000 barrels and 2.5% on orders of at least 7,500 barrels. Determine whether the least-cost order quantity is still the EOQ of 3,500 barrels