In Serbia, it's usually 2-3,5€ (most usually 2,5-3€ (300-350rsd)) and you have to work 2-3 hours for a meal. For example, KFC pays 3€, one person bucket (5 strips and mini (micro?) fries) costs 5€, Zinger menu is 7€ and similar
What is situation at your place
Minimum wage in Germany is 12,41€/h. I'm not sure what exactly fast food places pay, but I'm guessing minimum wage or maybe a tiny bit more. A menu at McDonalds is like 10-12€. At KFC a comparable meal to yours with 4 strips, fries and a drink is 10€.