On a local subreddit recently someone was asking where to get a decent lunch that "doesn't break the bank" and turns out that their target spend was $10. My answer was "Pack a peanut butter sandwich and an apple at home and take it to work with you." Which is my usual lunch.
I am just astonished that people spend $10-15 or more, every day, on lunch. And often will pay more to have it delivered.