If you're in central business locations in Mitte or Charlottenburg it would be more than that. That said you have very cheap options for Turkish, Arab or Vietnamese food in other districts like Neukölln. One of the best benefits I had when self-employed was the cheap & decent "ethnic" food options I had near the coworking space I chose in Neukölln vs having to go to the office in an expensive part of Mitte.
As a side note, I don't know anyone actually tipping 10%. At this price range usually it's rounded to next full euro.
We have plenty of those in our ethnic neighborhoods. Heck even some very successful joints like Rosamunde Sausage Grill in the Mission District (S.F.) were cash-only until a couple of years ago, when I last went there.
Most other places accept cards & thus have to factor that into the price of the offerings.
Most Döner and other Street Foods in Austria are cash only, but that's not the reason a typically priced Döner costs ~5€
But you can't go cash-only because so few people carry cash, that our would drive out your sales.
In EU 0.3% or 0.2% depending on card type: https://www.reuters.com/article/us-eu-payments-cards-idUSKBN...
A döner is between 2.5 and 5.0 EUR in Berlin (roughly 2.75 to 5.5 USD).
That's takeaway or eat in at a place with a few tables but w/o table service.
Meraba, which uses high quality organic meat from the region, comparable to the quality of the protein stated in the article, asks 4.5 EUR. A whole plate is 10 EUR.[1]
If order to your doorstep it's 6.5 EUR.[2]
[1] https://www.top10berlin.de/en/cat/eating-257/kebab-shops-230...
[2] https://www.lieferando.de/en/meraba