For a product to be selectable on an opportunity, two primary conditions must be met. First, the product must have an active price book entry within an active price book. Second, that specific price book must be selected on the opportunity record itself. If the sales representative is using an opportunity with a different price book (e.g., a standard price book instead of a custom one for the new keyboard), the product will not appear in the selection list. Therefore, the administrator must check both the product's association with the correct price book and the price book selected on the opportunity.

B. Make sure the price book Is in the company currency: While currency mismatch can cause issues, it doesn't prevent the product from being available for selection if the price book is otherwise valid.

D. Verify the product has a start date entered: A start date is not a required field on a product or price book entry, and its absence would not prevent the product from being available.

1. Salesforce Help. (2023). Considerations for Using Products and Price Books. Salesforce. Retrieved from https://help.salesforce.com/s/articleView?id=sf.productsconsiderations.htm&type=5. (This document states, "To add a product to an opportunity...the opportunity’s price book must contain the product.")

2. Salesforce Help. (2023). Add and Remove Products from Opportunities. Salesforce. Retrieved from https://help.salesforce.com/s/articleView?id=sf.opportunityproducts.htm&type=5. (This guide outlines the process, which implicitly requires the product to exist in the opportunity's selected price book.)

3. Trailhead by Salesforce. (2023). Products, Price Books, and Schedules. Retrieved from https://trailhead.salesforce.com/content/learn/modules/products-price-books-and-schedules. (This module explains the relationship: "An opportunity has one price book. A price book has many products.")