Six machines are located on either side of a bidirectional conveyor system, as shown in the figure below. For the flow information given in the table, how can the machines be rearranged to minimize the time products spend on the conveyor? Assume the load transfer station for each machine is located in the midpoint of the machine edge facing the conveyor. Distances are given in feet.

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A B C A B C D E F - 100 200 20 100 100 150 250 250 75 0 50 0 125 225 - 300 D E F 50 -100 A B C Bidirectional conveyor system D E F