What does a hamburger bun, a bag of dog food, a box of tampons, an air conditioner, or an NVMe SSD cost in different U.S. ZIP markets? This fixed research snapshot contains 1,861,051 unaggregated, quality-filtered retail price observations across 57 product categories, 12 U.S. ZIP markets, and 29 consecutive dates from July 21 through August 18, 2026. One analysis-ready CSV… See the full description on the dataset page: https://huggingface.co/datasets/costinflation/what-things-cost-57-categories-12-us-zips.