Adrian wants to purchase his textbooks for the semester. His options are to purchase the books online with next-day delivery at a cost of $175, or to drive to campus tomorrow to buy the books at the university bookstore at a cost of $170. Last week he drove to campus to buy a concert ticket because they offered 25 percent off the regular price of $16. Given that driving to campus to buy the concert ticket was rational for Adrian, Adrian should Multiple Choice not drive to compus to buy the books because the cost of gas and his time must certainly be more than the $S he would sove drive to compus to buy the books because the books are cheaper at the bookstore than online, drive to compus to buy the books because the $5 he would save is more than he saved by driving to compus to buy the concert ticket not drive to compus to buy the books because the $5 he would save is only two percent of the cost of the books, and that is much less than the 25 percent he seved on the concert ticket