Simplex Solver 1.0 optimizes (maximizes or minimizes) a linear objective function Z subject to a number of linear restrictions (first degree equalities and inequalities).
After entering the input data press Solve button and move your mouse over tables cells. You will find a visual description of how the numerical values were obtained.
Try now Simplex Solver 1.0 . If you like this software buy it and enable all features :
Need to sell your own digital goods?
Fill out a simple web form and ... that's all!
PayPal Button Generator 1.0 is a powerful PayPal button maker that creates a buy now button and a custom thank-you page that contains a unique download link to your digital goods. This download link remains valid for a certain number of hours specified by you.
The script can also sends customized emails to notify you and the buyer about the transaction that took place with your digital goods.
Events during the transaction are recorded chronologically in a text file for further investigation. There is no need for a database.
And by the way if you already use an IPN script you can still use it.
All variables relating to transactions received from PayPal will also be sent for further processing to your old script as a POST request.
Good luck !