The Consumer Price Index measures the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services. If you are looking to open a file related to CPI data, it could be in a format like Excel, or a https://cruxtekk.com/what-are-...file format used by statistical software. In this case, you would typically use a program like Microsoft Excel, Google Sheets, or statistical software like R or Python with libraries like pandas to open and the data.
