See https://btv-open.dreamhosters.com/2016/11/13/weight-loss-personalsystemreviewedadjusted-over10y/ for a framework.

I often fool myself trying to save time and money by buying cakes or ice cream (examples of fatty food)  in bulk and stock up, hoping that I would eat them slowly. Reality — I’m not different from my son. I over eat these things. The stock at home is just a temptation too great to resist.

strong advice: for any unhealthy food, it’s better to buy in small quantity, and pay triple the quantity price

— warehousing beats eating immmediately .. for both my son and me, buying unhealthy food without eating right away .. is an acceptable thing, vastly better than taking the same free food, and eating.
cCost is more severe than $cost