11. A factory with four major departments is to be arranged so that the cost of moving materials between the departments will be at or near the minimum. The product mix for the next 2 years has been forecasted and the number of trips that will result between departments has been estimated. Based on the anticipated load sizes and the materials-handling methods that are to be used, the cost per unit of distance between the departments has been estimated. This data is shown in the table that follows. Develop the nearness priorities for the pairs of departments.

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Movement EXPECTED NUMBER FROM TO OF TRIPS COST PER UNIT OF DISTANCE A B 300 $0.16 A C 100 0.16 A D 150 0.12 B A 100 0.15 B C 350 0.18 B D 200 0.18 C A 425 0.16 C B 300 0.15 C D 100 0.12 ODDO ABC 30 0.25 50 0.22 100 0.26