Can someone help me solve this problem?

A property title search firm is contemplating using online software to increase the productivity of the researcher performing the search. Currently, an average of 65 minutes is needed to do a title search. The researcher cost is $1.70 per minute. Clients are charged a fee of $420. Company A's software would reduce the average search time by 16 minutes, at a cost of $3.70 per search. Company B's software would reduce the average search time by 21 minutes at a cost of $5.70 per search. a. Calculate the productivity in terms of revenue per dollar of input. (Round your intermediate calculations and final answers to 2 decimal places.) Productivity Approach (Revenue per Dollar Input) Current Company A Company B b. Which option would have the highest productivity in terms of revenue per dollar of input? Company A O Company B O Current