"… William Reid, a graduate student at American University, has spent only $5.50 on store-bought groceries in the past two years. Total. As in, $2.75 a year.
The rest he finds on his own. Dumpster diving." …
http://college.usatoday.com/2016/07/28/how-one-grad-student-eats-for-just-2-75-a-year-really/