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Stolen from Reddit
https://www.reddit.com/r/dataisbeautiful/comments/1ftmkwt/oc_foods_cost_vs_caloric_density/
But I loved it. Also this has Shrimp removed, because it was on the OG chart due to an error and this is an updated version.
EDIT: Here is one for protein! https://www.reddit.com/r/budgetfood/comments/1fp2ytb/foods_cost_per_gram_of_protein_vs_protein_density/#lightbox
We need a graph of vending machine items cost-per-calorie. I know I could get an 800 calorie honeybun for $1. But that was 2000s numbers.
Some people requested it for comparison! But let's see if I can do some quick back of the box math.
https://www.walmart.com/ip/Great-Value-Glazed-Honey-Buns-10-5-oz-6-Count/14336401?classType=REGULAR&from=/search
1200 calories for 2 dollars, so 600 calories per dollar or .15 for 100 calories, putting it around oat in price terms. Which is expected since it's just bread and sugar, but still far more expensive than like pasta. Name brand is a lot more expensive.