After watching the Ted Med talk, by Elizabeth Nable how can humility make us better managers?

A property title search firm is considering new software. With current software the firm owns it takes 40 minutes on average to do a search. Researchers who work for the company are paid $2.50 per minute, and the company charges clients $300 per search. New software can be rented for $3.90 per search, and it would reduce time per search to 30 minutes. What would the change in revenue per dollar of search cost be from utilizing the new software?