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