Exercise 7 Speakerboxx Music, Inc. produces a hip-hop CD that is sold for $15. The contribution margin ratio is 30%. Fixed expenses total $6,750. Instructions a. Calculate the variable cost per unit. b. Calculate how many CDs that Speakerboxx will have to sell in order to break even. c. Calculate how many CDs that Speakerboxx will have to sell in order to make a target net income of $16,200 Fill in the dollar amounts for the summary income statement below based on your answer to part c d. Sales revenue Variable costs Contribution margin Fixed costs Net income