| X1 | X2 | S1 | S2 | S3 | S4 | |
| I | 0 | 0 | 120 | 90 | 70 | 50 |
| II | 0 | 50 | 20 | 40 | 70 | 0 |
| III | 20 | 50 | 0 | 20 | 50 | 0 |
| IV | 60 | 30 | 0 | 0 | 10 | 20 |
| V | 70 | 20 | 10 | 0 | 0 | 30 |
| VI | 70 | 0 | 50 | 20 | 0 | 50 |
VALUES OF VARIABLES AT THE SIX BASIC FEASIBLE SOLUTIONS
(I, II, III, IV, V, VI in the figure)
(Nonbasic variables in boldface)
Note that at adjacent Basic Feasible Solutions, all except one of the basic variables are the same and all except one of the nonbasic variables are the same. That is, an adjacent BFS can be obtained by exchanging a basic and a nonbasic variable.
