jeff needs to buy his textbooks for the coming semester of college. it is only two weeks before the first day of class, and he still has not made a purchase. jeff wants to buy them somewhere other than the bookstore since he is still living at his parents’ home and won’t be on campus until the day before class. jeff goes online and looks for sites that sell the textbook. then he remembers that one of his friends had said something earlier about finding the book for a great price. jeff then calls his friend to get the name of the site. in terms of jeff’s buying decision process, his going online to look for sites was part of and his calling a friend was

Wo firms, a and b, each currently dump 50 tons of chemicals into the local river. the government has decided to reduce the pollution and from now on will require a pollution permit for each ton of pollution dumped into the river. it costs firm a $100 for each ton of pollution that it eliminates before it reaches the river, and it costs firm b $50 for each ton of pollution that it eliminates before it reaches the river. the government gives each firm 20 pollution permits. government officials are not sure whether to allow the firms to buy or sell the pollution permits to each other. what is the total cost of reducing pollution if firms are not allowed to buy and sell pollution permits from each other? what is the total cost of reducing pollution if the firms are allowed to buy and sell permits from each other? a. $3,000; $1,500 b. $4,500; $3,500 c. $4,500; $4,000 d. $4,500; $2,500