Use the following to answer questions 15-16: Lamar & Co., makes and sells two types of shoes, Plain and Fancy. Data concerning these products are as follows: Plain Fancy Unit selling price $20.00 $35.00 Variable cost per unit 12.00 24.50 Sixty percent of the unit sales are Plain, and annual fixed expenses are $45,000. 15. The weighted-average unit contribution margin is: A. $4.80. B. $9.00. C. $9.25. D. $17.00. E. some amount other than those above. 16. Assuming that the sales mix remains constant, the number of units of Plain that the company must sell to break even is: A. 2,000. B. 3,000. C. 3,375. D. 5,000. E. 5,625