spend. don’t just guess. next you have to figure out what you’re buying and decide if you want to keep buying it. as you build your stock pile you will notice you will spend about the same amount for a month or 2 but getting a lot more food. then you will notice you you don’t have to spend as much and you can slowly shave off amounts of your grocery budget.
if you already have a stock and you are trying to see if you can live on less, there is a way you can figure out your ideal amount too. it is found through trying to live on less! 