Last year, sales at company x were 10% greater in february than in january, 15% less in march than in february, 20% greater in april than in march, 10% less in may than in april, and 5% greater in june than in may. in which month were sales closest to the sales in january?

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?