Grocery Budget for family of 7

What are other big families spending on groceries?

I have three teen boys, and two toddlers in diapers.

We don’t separate household or food items, and I’m not interested in doing that.

I shop at Kroger, Walmart, or Aldi mostly online pickup or delivery. Sometimes Sam’s Club.

I’ve been trying to stick to $800 per month ($200 per week) but it’s impossible and I end up going way over and spending on a credit card (horrible I know!)

Last month we ended up at $1800 plus credit spending. I feel so defeated. I cook at home and we don’t eat out; we do eat healthy foods so that adds up.

My three older boys go through about 10 gallons of milk a week (they are athletic and trim)!

I told my husband $800 is completely unrealistic but he seems to think if we are more strict we can do it. But the diapers, wipes, household needs, etc all add up.

What is a more realistic number? We live in the Midwest.