Worksheet for Externalities based on the article Cities with soda taxes saw sales of sugary drinks fall as prices rose, study finds (NPR, January 6, 2024): https://docs.google.com/document/d/1Y57yjaPYAZaM9zij4YjD9Yl_CE-S_3XD/edit?usp=sharing&ouid=100480691374776403328&rtpof=true&sd=true
(Externalities, Elasticity)