Write a two- to three-paragraph response to the following: Explain how purchasing can help to improve the competitive edge of an organization. Support your answer with citations from the assigned reading Wisner, J. D., & Tan, K. (2018). Principles of Supply Chain Management: A Balanced Approach (5th ed.). Cengage Limited. https://reader2.yuzu.com/books/9780357296509. Post your reply under the topic "Purchasing