Reflect on your culture and any subcultures with which you identify. Outline several characteristics of a subculture(s) and how that impacts specific purchase behavior. Consider offerings and any factors connected to them (e.g. pricing, value perceptions, brands, etc.). You can highlight any product or service you've purchased in the past. Consider the roles and reference groups as well as potential personal and psychological factors that might also tie into your identifying yourself as a member of that subculture. 

Note that your example should be unique at the time you post, so you'll again have to reference those posted before yours to ensure you do not duplicate accidentally in order to receive full credit.