That's certainly possible. You just need to plan your shopping better.
assitant
Do you have a fixed cost for your rent, mortgage, utilities, etc.?
assistant
I'm trying to budget my weekly grocery bill. Can you help me out with that?
user
Sure.  If you can tell me what you currently spend each week, and also your fixed costs, I'll be able to help you figure out your budget.  Do you have that information?
assistant
I spend about $140 a week in groceries. I'd like to cut it down to $100 to start.
user