Business Insider: You may pay nearly $8 for a McDonald’s Big Mac in Massachusetts versus $3 in Oklahoma. Here’s why costs can vary — even for locations across the street from one another.

Business Insider: You may pay nearly $8 for a McDonald’s Big Mac in Massachusetts versus $3 in Oklahoma. Here’s why costs can vary — even for locations across the street from one another.. “Riley Walz is a business major at the Macaulay Honors College at the City University of New York and dabbles in coding. The 20-year-old one day hopes to run his own business. Until that happens, he’s taken on the unofficial position of ‘fast-food data scientist,’ thanks to his latest side project, the Fast Food Index. Walz’s index, distributed to classmates last month, tracks the pricing of four popular fast-food items…”