Question - Explain why it is important to evaluate the overall performance of the firm's sales force and list the advantages and disadvantages of sales, cost, and profit analyses. Also, discuss the use of ROI in measuring overall sales performance and the difference between input, outcome, and profitability measures. What should the sales supervisors and managers do when few of their sales subordinates do not achieve their sales goals/targets/quotas? Please provide real-life examples in your discussion.