The photo is a tweet. The tweeter, Hüseyin (@ateriadaptoru), is complaining about the high cost of living, specifically in university. The joke, in Turkish, is in the lines: "20k kyk borcum var tavuk döner ve karton bardak çaya 20k para harcamışım üniversitede inanılmaz" This translates to: "I have 20,000 TRY in Kredi Yurtlar Kurumu (KYK) student loan debt, and I spent another 20,000 TRY on a chicken kebab, a carton of drinks, and tea in a cup. It's unbelievable at university." The humor comes from the juxtaposition of significant student loan debt with the seemingly small expenses of a meal. The implication is that the cost of everyday necessities are exceptionally high relative to the financial means of a student. The use of "inanılmaz" (unbelievable) emphasizes the speaker's feeling of financial hardship and frustration with this situation.