Cost by Protein Source

While I agree with the general sentiment, it's absurd to compare dried pasta to foods that dont need to soak up water.

Pasta will pick up about 100% of it's volume in water when cooking and has about half the density of water from what I could find right now, so your 100g of dry pasta would be 300g of cooked pasta, so the effective protein density is 1/3 of that displayed on the chart