Sales worker supervisors need knowledge in the following areas:

• Customer and Personal Service: Providing special services to customers based on their needs.
• Administration and Management: How to run a business or group.
• English Language: The meaning and use of the English language.
• Sales and Marketing: The methods for selling products and services.
• Personnel and Human Resources: The policies to hire and retain employees.
• Education and Training: The methods of teaching and learning.
• Economics and Accounting: Banking and business.
• Mathematics: The rules and uses of numbers.
• Computers and Electronics: Computer hardware and software.