For a job like that, they do most of the talking, and they will usually tell you what the hourly rate is (probably minimum wage). When they ask why you want the job, tell them you will be working your way through college and you feel that the experience of working for Walmart will teach you a lot about retail and supply chain management (which is the process of optimizing the shipment of products from the suppliers to Walmart). Tell them that you are excited about getting the job, and that you are looking forward to it. In other words, lie.
