At the beginning of a sowing season, there will be

surplus of 6, 9, 7 and 5 tractors in four villages A,

B, C and D while other three villages X, Y and Z

will require 8, 7 and 12 tractors respectively for

farming purposes. The cost of moving tractors is

directly proportional to the distance between the

surplus and deficit village, and the distance is kms

are given below :

Surplus villages Deficit villages

X Y Z

A 26 22 28

B 19 27 16

C 39 21 32

D 18 24 23

Determine the optimal scheme for delivery of

tractors from surplus villages to deficit villages.

Use VAM only.