I have a family of 7 and we never really had a budget before but now we woke up an decided to pay off our debt. We go week by week most of the time $100-200 works for us(while on budget). We aren’t big meat eaters and I buy a lot of sale items. I stock up when I can.
We go through 3-4 jugs of milk a week and about 10 loafs of bread. It quickly adds up when you add expensive items like cheese. In Ontario cheese is almost $8 a brick and my kids could eat 2-3 a week so we stopped buying it local and take a trip to Buffalo once or twice a month.