The main purpose of this legislation, known as the Lower Grocery Prices Act, is to direct the Comptroller General of the United States to conduct a study on grocery costs for consumers in the United States. The goal is to understand how grocery prices have changed over the past 20 years and to identify ways to reduce these costs for consumers. The key provisions of the Act include a requirement for the Comptroller General to analyze the Consumer Price Index for food purchased for home consumption over a 20-year period.