Which of the following is the correct calculation for the contribution margin ratio? a. contribution margin divided by variable costs. b. revenue divided by variable costs. c. contribution margin divided by selling price. d. revenue divided by contribution margin. e. contribution margin divided by fixed costs.

Anew joint command and control system is being developed to meet the strategic information needs of all the military services. the air force is the lead service, but the army and navy have different points of view about what functions the system should perform. which one of the software acquisition best practices would be most relevant in managing this issue as the program office undertakes system development?