I write a lot about survival food and supplies, but I'm also aware that most people are on a tight budget these days. Many of us are out of work and even most people who have jobs are struggling to make ends meet. All I can suggest is that people make a few sacrifices so they can get at least a one-month supply of food and water. It's worth it. Look at it this way, if your financial problems get worse, at least you won't have to worry about groceries for a month.
I usually suggest people buy more of what they normally eat, but if even that seems too daunting, remember the basic elements are still very cheap. Flour, rice, beans, pasta, all of these things store well and you can buy lots of it for very little money.
Anyway, today I found a video that kind of sums up these thoughts. The narrator is funny, and he makes a lot of good high calorie/low cost food suggestions. So if you're poor and you haven't stocked any food yet, start here.
You can watch the full video below.