Aarav wants to read "The Wealth of Nations", by Adam Smith. He can either buy a copy at the bookstore near his house for $15, or bike across town and check it out from the public library. There is no charge to check books out of the library, but the hassle of biking across town would cost Aarav $7. What is Aarav's economic surplus from checking the book out of the library instead of buying it at the bookstore? Multiple choice question. $8 $7 $15 $1