Final answer:
Best Buy and Brooks Brothers are not in a competitive relationship.
Step-by-step explanation:
In this situation, Best Buy and Brooks Brothers are not in a competitive relationship. This is because Best Buy is an electronics retailer, while Brooks Brothers is a clothing retailer. The customer's decision to spend their $300 at one of these stores does not affect the other store's sales or operations, as they serve different market segments. Therefore, there is no direct competition between the two retailers in this case.