* Public vs. Private: Public universities (universidades públicas) are significantly cheaper than private universities (universidades privadas). Public universities often have very low tuition fees, sometimes even nominal fees, though they may have other costs associated. Private universities can be quite expensive, comparable to or even exceeding the cost of some universities in the US.
* University Prestige: More prestigious universities, both public and private, might have higher costs associated, even if they are public.
* Program of Study: Certain programs, like medicine or engineering, might have higher costs associated with labs, equipment, and materials.
* Location: Universities in larger metropolitan areas tend to have a higher cost of living, which impacts overall expenses.
In short, there's no single answer. You could find programs for a few thousand pesos per semester at a public university, while private universities could cost tens of thousands of pesos per semester or even more. The total cost will also depend on living expenses (housing, food, transportation) which can vary greatly depending on location and lifestyle.
To get a precise estimate, you need to research specific universities and programs that interest you. Check the university's official website for tuition information and factor in the cost of living in the city where the university is located.