Australia. Nothing you will buy to eat at a lunch place in the CBD and that will go into a plate will cost you less than 5 USD. Add a coffee, insist that whatever goes in the plate be edible, and you’re not spending less than 10 USD. If I’m short of cash, I’ll make do with a sushi roll or two; 2 USD a piece. I often just bring in a can of tuna and some nuts.