Why don't either of you cook? I hate to think of what is in most ready meals, they're purely an emergency meal here and even then I'd rather have pasta and pesto in a real emergency or whack some veg in the pressure cooker for soup.
We don't count the cost of food when shopping but tend to spend around 80 a week for 4 plus dog. Farm shops for meat, veg and dairy cause I am fussy on organic/free range/poncey bullshit then a supermarket, normally aldis every few weeks for tins, coffee etc. If we drank regularly this would go up, but we spend a tonne on fruit and coffee tbh.
I tend to just buy a joint for a roast on Sunday which can do something on Monday. A pack of mince for spaghetti bolognese, chilli, meatballs, burgers, lasagne whatever, then a couple of chicken breasts or some pork or something for fajitas, kebabs, casserole or something. Then a home made pizza with mozzarella on a Sat. Have soup one night.
Very little wasted as we have leftovers for lunch, ham for sandwiches 'make own bread in breadmaker), snacks are fruit, nuts, home made flapjack or cake or whatever. Sometimes buy some choc ices or something too, we also have fish sometimes when I remember, and maybe a pasta or jacket spud night when I am feeling lazy. Breakfast is eggs (we have chickens), porridge, yogurt and fruit and bacon at the weekend.
Cooking doesn't take that long, and is healthier and cheaper.