A property title search firm is contemplating using online software to increase its search productivity. Currently an average of 40 minutes is needed to do a title search. The researcher cost is $2 per minute. Clients are charged a fee of $400. Company A's software would reduce the average search time by 10 minutes at a cost of $3.50 per search. Company B's software would reduce the average search time by 12 minutes at a cost of $3.60 per search. Which option would have the highest productivity in terms of revenue per dollar of input?
A) Company A at $5.83 per $ input
B) Company B at %5.73 per $ input
C) Company A at $6.28 per $ input
D) Company B at $6.72 per $ input
E) Neither, the current search process is optimal