Corner point
Z = 600 x + 400 y
(5, 0)
3000
(6, 0)
3600
(4, 4)
4000 ←
Maximum
(0, 6)
2400
(0, 4)
1600
We see that the point (4, 4) is giving the maximum value of Z Hence, the
manufacturer has to produce 4 units of each item to get the maximum profit of Rs 4000 Example 11 (Transportation problem) There are two factories  located one at
place P and the other at place Q From these locations, a certain commodity is to be
delivered to each of the three depots situated at A, B and C