A company needs to locate three departments (X, Y, and Z) in the three areas (I, II, and III) of a new facility. They want to minimize interdepartmental transportation costs, which are expected to be $0.50 per load per meter moved. An analyst has prepared the following distances and flow matrices: Distances (meters) From/To I II III I - 10 20 II - 10 III - Flows (loads per week) From/To X Y Z X - 60 90 Y 40 - 160 Z 110 140 - How many least costly process layouts are there