The modern history of toothpaste began in 1892. That was the year Dr. Washington Sheffield of the USA invented the collapsible tube for storing toothpaste. Four years later in 1896, Colgate began making its own brand. The Early Toothpastes.
Prolog is relatively easy to deploy, and the cost for a small company to implement the system would be in the range of $10,000 for three concurrent licenses and another $10,000-15,000 for implementation and basic configuration.
Now the main question is, how much it costs to develop a Drupal website from scratch. If you are lucky then there will be no additions required and the already available open-source and modules will be sufficient for the development of the cost. A basic Drupal project may cost from $30,000 to $40,000.