How does it compare with what you would usually spend per week?
I'm definitely spending more than pre-lockdown - about £150 per week all in, which is one Tesco delivery and a veg or fruit box weekly. There are two adults, one teenage DS who is hungry all the time and eats way more than I do, and DD 10 who has the appetite of a sparrow unless it involves sweets.
I reckon pre-lockdown I was probably spending £100 per week on the main weekly shop.
Some items are more expensive - the offers aren't always there and I can't always get the cheaper brands or bigger sizes of things (so end up buying 2 small instead of 1 big pack of something for example). But, the main difference is that everyone is at home for all meals, whereas there would be some school lunches, some meals out, sometimes kids at friends houses for tea or vice versa. And, admittedly I have bought more 'treat' food that we wouldn't usually have.
Also, shopping has become a bit like in the Big Brother house, where everyone seems to be involved in decisions over what we get (there is an 80 item limit on a tesco delivery) and I am allowing everyone to choose one 'treat' item each. (DS picked salt n vinegar pringles, DD haribo tangfastic, DH dairymilk and I had a packet of Wagon Wheels in case anyone is interested!).
I can't imagine spending £300 in one go at Aldi or Lidl unless there was some pricey purchases from the 'middle aisle' included?