Answer: Management information system
Explanation:
Management information system is one of the type of computer system in which it manages the various types of operations in an organization. It basically consist of software and the hardware that analyzes all the information or data on the online system.
The management information system is basically helps in the decision making process, analyzing prices and also control the overall organization data or information in the system.
According to the question, Bill operating a small retail business and the management information system provide huge benefit to the bill's business.
Therefore, Management information system is the correct answer.