J.A.
L.,
6 years ago I had 2 working adults, 3 teenagers, a big dog and a cat and I spent $150-$180 per week -- 6years ago! I now have 3 adults and the 2 animals for the last year and we spend $125 - $150 per week.
You will have to average all your answers. Everyone shops differently - prepare from scratch to heat-n-serve - and at different types of food stores.
Good luck.