There are three employees that will be working on this campaign, one with an annual salary of $112,500, the second with an annual salary of $72,830, and the third with an annual salary of $36,400. Assume it will take approximately 6.25 days to complete the campaign. Use the marketing staff expense worksheet to calculate the daily rate of each employee. 

1. Explain why you (hypothetically) need three employees at three different rates. 
2. Further, explain why you might have selected the duration of 6.25 days.