$25 for a chicken sandwich and a beer at the last Nats game I attended. There are lots of ways to keep the cost down though, especially by eating outside the park before the game or bringing food in with you. We usually bring our own water bottles and refill inside the stadium.
I rarely eat at the ballpark and most of this season I was spending 2020 bonus money that was going to expire so I didn't pay much attention to prices. I wouldn't have even noticed except that the server asked if I wanted to take a picture of her screen showing the price. Makes me wonder if a lot of people were having the same reaction to the price jump.
Next year I'll remember to eat/drink on the way and bring peanuts from the store.
