please answer

QUESTION 5 Benjamin is looking to buy a new laptop. He travelled to the largest computer store in Brisbane, hoping to find the best bargain for a new laptop. Benjamin took the bus to the store which costs him $3. At the computer store, Benjamin needs to consider how many hours he should spend looking for a new laptop. The longer he spends searching, the higher the chances he can find a better bargain for his new laptop. For the first hour of searching, Benjamin will get an incremental benefit of $130. Subsequently, he will only get incremental benefits of $60 from the second hour, $36 from the third, $20 from the fourth and $3 from the fifty. The cost to Benjamin from searching, mainly due to fatigue and boredom, is $10 for the first hour, $15 for the second hour, $21 for the third hour, $36 for the fourth hour and $50 for the fifth hour. In determining how many hours Benjamin should spend searching for a laptop, the transportation cost to the store by bus is alan A . Type A for Average cost, M for Marginal cost, S for Sunk cost or O for Opportunity cost. Using marginal analysis, Benjamin should spend how many hours searching for a new laptop? The maximum surplus for Benjamin, from spending the number of hours searching which you found in part b, is $ Answer to the nearest whole number (with no decimal places)