Lewis is a salesperson for MPG Industries. He sells machines for molding plastic furniture. MPG has developed a machine that is 50 percent smaller than what is currently on the market and costs 25 percent more. It is Lewis's job to show potential customers how the new machine will save them money in the long run. He must be able to address each customer's needs with technical know-how and an ability to communicate his knowledge. Lewis is an example of a(n): * O Retail salesperson O Detail salesperson O Sales engineer O Service salesperson O Account representative