The following tableau enables you to practice the simplex method without having to do the arithmetic! You can enter your own problem. Try some from the problem sheet or the text book. Just leave blanks if you don't need all the rows and columns.
Due to a JavaScript super-bug, on some platforms the last radio bottom - beg your pardon - button, on a form cannot be turned OFF on the screen. So the fact that you see it ON does not mean that it is ON computationally. To check whether or not your platform is infected
This should turn OFF all the radio buttons.
If you machine is infected, do the following: