can someone plz explain how I get the equation?? like how do u get 15x30. where do you look. how do you do it. I know the equation is distance between 2 locations x no of trips but I have no idea how to read rhis.graph

Page 2 of 2 BA:15y =30 1 CAS20x2=40 Problem C (Ch 9 An insurance claims processing center has four work centers, any of which can be placed into any of four physical departmental locations. Call the centers A, B, C, and D and the departments 1, 2, 3, and 4. The current set of assignments is A-3, B-1, C-4, and D-2. The matrix of departmental distances, in meters is given in Table 1: Table 1 2 3 4 Distance between 1 10 30 30 2 20 20 3 40 1 Locations 4 No of trips No of ups The matrix of work flow among centers (estimated trips per day) is given in Table 2: Table 2 A B D A 15 20 15x30+20x +0+20x + 50x 0 B 20 50 0 50 30 D 30 60 20 The firm estimates that each 10 meter trip costs approximately $4. 1. What is the movement cost per day of the current assignment? 0 +0+0+50x 0x + 30x tox tox Problem D