The cost benefit analysis in the view of utilitarian

I think utilitarian would support the education of K-12 because the side of benefit outweighs the cost of education. As utilitarian supports something that would bring people happiness, they definitely would support going to school. Going to school requires consuming a lot of money, however, when we see the later effect of having education, people are able to get much more money than the money they have spent before by getting better job and earning more money. Then this would bring happiness to themselves, and even to the government and countries. As country has a lot of educated people, it would help country develop economically, socially, and politically. Eventually this would bring happiness to all the citizens of the country which is the reason why untilitarians would support the compulsory education of K-12.

On the other hand, this idea might ignore people's right and freedom to choose what they want. Some people might not want to get education, because they think that as waste of time. Also some people simply might not have enough money to afford, so the idea of utilitarian would ignore the individual right. Also the time, or friends cannot be considered as costs. These things can't be given values.