Input Output "Supply cost (in $1,000)" Service zones Routes A B C D E A B C D E Energy suppliers 1 70 47 22 53 98 Company 1 2 75 38 19 58 90 2 3 15 78 37 82 111 3 4 60 23 8 39 82 4 5 45 40 29 75 86 5 Cost