Top maragement's unhisppr with the investment center's caturn on investment (ROH, it asks the manager of the South Division to submit blans to improve ROI in the next year. The manseer believes it is feacible to consider the followine lindependent coupses of action. 1. Increase sales by $300,000 with nochange in the contribution margin percentage 2. Reduce variabie costs by $160.000. 3. Reduct average operatingassets by 3.00K. (a) Compute the return on irvestiment (RON) for the current year. (Round ROI to 2 decimal places, es, 1.57X ) Returnon imvestment \% (b) Usine the ROI cquation, compute the ROI under each of the proposed courses of action. (Round ROI to 2 decimal places, es 1.57NA