You believe that you can earn 2% more on your portfolio if you engage in full-time stock research. However, the additional trading costs and tax liability from active management will cost you about 0.5%. You have an $800,000 stock portfolio. What is the most you can afford to spend on your research

Aproperty 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 higher productivity in terms of revenue per dollar of input?