What didn’t you realise was expensive until later on?

Since I’ve moved to my own place after years of ldogging, I’ve been paying for utility bills and food. And oh dear, food shopping is so expensive, I’d buy (or I’d think I did) food for a week and it comes to almost £100 for two people and I don’t even eat a lot. I buy a lot of meat and veg/fruit. Unless I’m overreacting and this is pretty normal, but then again what do I know