Four machines are located at the coordinate points (0, 20), (0, 40), (20, 0), and (40, 0).

Thirty percent of the item movement between the existing machines and a new machine is between the new machine and each of the existing machines at (0, 20) and

(20, 0). Twenty percent is between the new machine and each of the existing machines at (0, 40) and (40, 0). Rectilinear movement is used. Construct the contour line passing through the positive quadrant and beginning at the point (0, 60). If the machine locations are interpreted as docks, and the contour line is interpreted as the periphery of the warehouse, what warehousing interpretation might be given to the percentage weights? Explain.