When I bought Turbo Pascal in 1987, the retail price was $59.95 (USD), IIRC. A little earlier it was less, $39.95 IIRC. Pascal was an academically-oriented language, which would only let you use variables correctly according to their declared type, but Borland Pascal included a very useful and sensible set of loopholes for getting around all that in the many cases when that was necessary to make a program useful in the real world. It was a non-academic implementation of an academic language.