15. What should a firm faced with a production constraint do to maximize total contribution margin? a) Promote those products having the highest unit contribution margins. b) Promote those products having the highest contribution margin ratios. c) Promote those products having the highest contribution margin per unit of constrained resource. d) Promote those products having the highest contribution margins and contribution margin ratios. 16. What is a joint product? a) Any product that consists of several parts. b) Any product produced by a firm with more than one product line. c) Any product involved in a make or buy decision. d) One of several products produced from a common input. 17. A study has been conducted to determine if one of the departments in Parry Company should be discontinued. The contribution margin in the department is $50,000 per year. Fixed expenses charged to the department are $65,000 per year. It is estimated that $40,000 of these fixed expenses could be eliminated if the department is discontinued. These data indicate that if the department were discontinued, the company's overall operating income per year would change by how much? a) An increase of $10,000. b) A decrease of $10,000. c) An increase of $25,000. d) A decrease of $25.000