In this articleUBERDASHA food delivery messenger is seen in Manhattan. Luiz C. Ribeiro | New York Daily News | Tribune News Service | Getty ImagesFood from the restaurant of your choosing, delivered right to your door — at what cost?Third-party food delivery is becoming the norm for American consumers, as delivery apps like Grubhub, DoorDash and Uber Eats take hold in day-to-day dining. It's also presenting customers and restaurants with an increasingly complicated equation of service fees, delivery costs a ...