One point; Do this now, don't wait for a rush on the store because of a crisis. You don't need to do this in one trip, but plan on it each time you go shopping. My estimate is that this list of supplies is roughly a 30 to 60 day supply for ONE PERSON... You can ration it for a longer time frame, but assume 30 days and buy according to your funds and how many people you intend to provide for. https://www.mdcreekmore.com/the-best-survival-foods-to-buy-at-the-grocery-store/ You can substitute the name of most large "grocery" stores in place of "Walmart"... Just know which stores are accessible in your neighborhood. Personally, I avoid Safeway, Krogers, etc. They are not the best price point sources. If you find sales, then go for it. If you have a "Big Lots" or similar in you area, check their stock and unit pricing to compare.