I dunno, I think it would be easy enough to wrack up that kind of spending if you're buying fresh 'shove in the oven' type of meals for 5 people - you know chicken in a sauce in a tinfoil dish + prepped veg + fresh mash in a tub x 5 portions etc
Some weeks depending on our work schedules / commitments we can have very expensive weeks by relying on convenience & time saving food from places like M&S etc.
Add some wine, a few nice takeaways and of course the coke and I can see how it has happened.
Also for me, shopping for dinner every evening on the way home was ruinous. I would go in for dinner ingredients and come out with £20 of extras just because I saw them.
Mainly to save time and headpsace we have been doing a weekly shop on a Sunday. We sit and decide what we would like to eat that week, taking into account work for me and dh and school / sports / social life for teen dd.
We are not really doing this to economise but to simplify and take the pressure off each evening.
I then check if we have ingredients in the fridge / cupboard for any of the proposed meals and then I make a list of what we need.
It is bliss to NOT have to stop at any shops on the way home and to know that everything we need is ready and waiting at home! Makes the evenings a lot less stressful.
In the last 10 days we have had:
Cottage pie (used fresh ready made mash from 2 tubs on top to save time)
red thai chicken curry with rice, coriander and garlic naan bread, poppadoms and chutney
Chicken and broccoli gratin with roasted carrots
beef chilli with tortillas, cheese and sour cream
falafels in toasted pittas with hummous, salad and cous cous salad
High Tea (grilled bacon, sausages, pudding with fried eggs, beans and oven cooked hash browns)
Chicken Fricasse with roasted baby potatoes with herbs and shallots
Fillet steak (cooked on BBQ) with peppercorn sauce, baby potatoes and veg (oven chips for dd)
homemade meatballs in white wine and cherry tomato sauce with spaghetti, garlic bread , parmesan and olives
pizza
spatchcock peri peri chicken with homemade sweet potato wedges & coleslaw
I was amazed that each weeks shopping came in at around £65 for everything but there was no wine / or fizzy drinks in there