Can someone help with question B "Should Katy EH lower the price of Grill C? The owners wanted to know the impact if they lowered the price of Grill C to $75 and if doing so led to a 20,000-unit increase in sales of Grill C"

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http://www.chegg.com/homework-help/questions-and-answers/information-instructions-1case-summary-katy-eh-manufacturing-company-owners-katy-eh-manufa-q9705207?trackid=04e87872&strackid=2ea954bb&ii=1