A company offers ID theft protection using leads obtained from client banks. Three employees work $40$ hours a week on the leads, at a pay rate of $$25$ per hour per employee. Each employee identifies an average of $3,000$ potential leads a week from a list of $5,000.$ An average of $4$ percent of potential leads actually sign up for the service, paying a one$-$time fee of $$70.$ Material costs are $$1,000$ per week, and overhead costs are $$9,000$ per week.

Calculate the multifactor productivity for this operation in fees generated per dollar of input.