please explain the step by step and ill upvote and like if its correct. i want to knoe HOW to do the problem

A company offers ID theft protection using leads obtained from client banks. There are 6 employees who each work 40 hours per week on leads at a pay rate of $12.6 per hour. Each employee identifies an average of 8,441 potential leads per week. An average of 18 percent of potential leads actually sign up for the service, paying a one-time fee of $55. Material costs are $615 per week and overhead costs are $1.422 per week. Calculate the multifactor productivity for this operation in fees generated per dollar of input