demand=: 30 20 70 30 60
src=: 50 60 50 50
cost=: 16 16 13 22 17,14 14 13 19 15,19 19 20 23 50,:50 12 50 15 11

   demand cost vam src
 0  0 50  0  0
30  0 20  0 10
 0 20  0 30  0
 0  0  0  0 50