The Federal Reserve Bank of Chicago's Money Museum displays a transparent cube filled with stacks of $1 bills, claiming to contain $1,000,000. However, the author of the article counted the stacks and found that the cube actually contains $1,550,400. The author created a tool, Dot Counter, to help with the counting. The discrepancy may be due to the cube's dimensions being incorrect or the stacks not being packed solidly all the way through.