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| The demand for Puddles Ale, which costs $3.50 a gallon, is 2,500 gallons per month. It costs $15 to place an order and the cost of holding a gallon of ale in inventory for one year is 15c plus an interest cost equal to 10% of the purchase price. The order quantity which minimises inventory cost is (to the nearest gallon)：(2 marks) A 1,342 gallons B 2,509 gallons C 387 gallons D 474 gallons |