What conclusion does Meursault come to at the end of the text?

Mersault seems to be at peace with himself at the end. he just states that oh I don't care, everyone dies at some point so why does it matter that I have my life cut short by like 20 years. The way Camus says it, it doesn't seem like it is a bad thing so I assume that he wanted the readers to feel the same thing and as for Mersault being happy or unhappy, I wouldn't say he was either, just content, just taking what is given to him and not thinking any more or any less of the situation.