*9 Johnny Rockabilly has just finished recording his latest CD. His record company's marketing department determines that the demand f0;r the CD is as follows: Price Number of CD5 Total revenue Marginal revenue $24 10,000 22 20,000 20 30,000 18 40,000 16 50,000 14 60,000 The company can produce the CD with no fixed cost and a variable c of $5 per CD