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
Yeah canned tuna is almost always a dollar for a dinky little can of 100 calories. A pound of wings has many times that, with the online one I found being $3/lb.
So I guess this chart is doing a pretty good job at breaking up some preconceived notions!