Amelia is partnering with Frank, an engineer, to try and sell a new aerospace product. Amelia has the sales expertise, but the firm believes that the product is so high-tech that an engineer who helped design the product is needed to explain more of the technical details for clients who have questions. Amelia is very eager to make sales. Normally, Amelia likes to work alone, but she appreciates Frank's expertise because she thinks it'll help increase sales significantly. Amelia is paid by the sale, so her compensation depends entirely upon her sales during a given period. In addition to answering specific questions about the product, Frank will also provide the client organization with assistance on its applications and system design. Refer to Scenario 17.3. What type of compensation system does Amelia have for her personal selling efforts