An application developer needs to customize the IBM WebSphere Commerce pricing engine while integrating with IBM Sterling Order Management, and create a price rule element class to use for business…

An application developer needs to customize the IBM WebSphere Commerce pricing engine while integrating with IBM Sterling Order Management, and create a price rule element class to use for business purposes. There is a requirement to avoid duplications in price calculation and yield a unique price. Apart from ComparisonConditionElementCmdlmpl, which two other commands must the application developer customize?