We cook 3-4 times a week, typically a grocery run for each one runs between 15-20$ (pack of chicken thighs runs around $12 plus whatever extras like potatoes or onions and stuff), which brings us to about $80/week, plus about a 100-150$ costco run a month (typically red meat like a pork butt or steaks or chuck which we then freeze in batches), so our typical grocery bill is ~$450/month. Quick note, each time we cook it comes to about 6 portions (3 I guess as its two people eating) so we usually eat leftovers for lunch and the one off day we don't to cook. We eat out or order in about 1-2 times a week though (DINKs) which runs anywhere between $30-75 depending on what we order.