A company needs to locate three departments (X, Y, and Z) in the three areas (I, II, and II) of a new facility. They want to minimize interdepartmental transportation costs, which are expected to be $.50 per load per meter moved. An analyst has prepared the following distances and flow matrices: Flows (loads per week From To Distances (meters) From To II II Y Z I 10 20 60 90 II 10 Y 40 160 III 110 140 How many least costly process layouts are there? 1 2 3 4