The specific case studies that need to be prepared for Commerce can vary depending on the curriculum and course requirements. However, here are some common case studies that are often covered in Commerce programs:

1. Enron Corporation: This case study focuses on the accounting scandal and corporate governance failure at Enron, one of the largest energy companies in the United States.

2. Volkswagen Emission Scandal: This case study examines the fraudulent practices employed by Volkswagen to manipulate emission tests, leading to significant legal and financial consequences for the company.

3. Apple Inc.: This case study explores the growth and success of Apple Inc., including its product development strategies, marketing approach, and supply chain management.

4. Amazon.com: This case study analyzes the business model and strategies of Amazon.com, including its competitive advantages, expansion into new markets, and use of technology.

5. Starbucks Corporation: This case study examines the global expansion and brand management strategies of Starbucks, including its focus on customer experience, partnerships, and sustainability initiatives.

6. Coca-Cola Company: This case study focuses on the marketing strategies and brand management of Coca-Cola, including its advertising campaigns, product diversification, and international presence.

7. Uber Technologies Inc.: This case study explores the disruptive business model and challenges faced by Uber, including regulatory issues, labor disputes, and competition.

8. Tesla Inc.: This case study analyzes the innovative approach and growth strategies of Tesla, including its electric vehicle production, battery technology, and sustainable energy initiatives.

It is important to consult your Commerce program syllabus or course materials to determine the specific case studies that need to be prepared for your coursework or exams.