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18) AAA cement will open a new rock pit. Two plans are designed for movement of aggregate from quarry to plant. Plan A requires the purchase of two earth movers and construction of a loading pad at the plant. Plan B calls for construction of a conveyor system from quarry to the plant. Using present worth determine which plan should be selected if money is worth 15% per year. 18) AAA cement will open a new rock pit. Two plans are designed for movement of aggregate from quarry to plant. Plan A requires the purchase of two earth movers and construction of a loading pad at the plant. Plan B calls for construction of a conveyor system from quarry to the plant. Using present worth determine which plan should be selected if money is worth 15% per year