Every major is different. If you want to save some money, you can buy photocopies in China or used books in the university bookstore. New books are generally above $ 100. Of course, you can borrow it from the school library, but it should be earlier.

Every school uses it differently.

However, on the whole, Man Kun's microeconomics/macroeconomics principles are applied to economics.

Calculus uses james stewart's.

The rest is hard to say.

Amazon is still used more here. Buy second-hand. It is better to have a paper cover. It is cheaper. You can buy it at the bookstore first. The general return policy is 1 week. No problem, but there are some strange situations. The books I bought last quarter are around 90 in bookstores and ama. Zon is 170- ... The landlord should take it according to his own situation. There should be no specialized courses in freshmen, all of which are basic courses. There must be that kind of second-hand book sale at school. You can go to this activity to buy it. Not expensive, but cheaper than second-hand books on Amazon.