It sounds like you are talking about the cost of doing a CS degree in a developed country. The $736 (number used in article, source World bank) number multiplied by 124 gives you $93k. That is enough to manage a degree at one of the cheaper (but perfectly OK - regulated to ensure minimum standards) universities in the UK such as Chester. It cover one year of fees at Oxford but not leave you much to live on. I am pretty sure there are cheaper options in Europe.

Of course, someone from a low income nation is most likely to go to university in their own country which is a whole lot cheaper (and a lot of low and middle income countries have free or subsidised university education - which is why British hospitals were historically had lots of South Asian doctors, and now Africans). If their own country does not offer the right degree or demand for limited places is very high they can study in another low or middle income country (I know Sri Lankans who have studied in India).