Consider the following premises. There is at least one x_8 for which x_8 will read a book if and only if x_8 is rich. For all x_8, x_8 is not a cashier. For all x_8, if x_8 were rich, then x_8 is a cashier. Can we infer the following from them? For all x_8, x_8 will read a book.
 From the fact that there is at least one x_8 for which x_8 will read a book if and only if x_8 is rich we can infer that there is at least one x_8 for which if x_8 reads a book, then x_8 is rich. From the fact that for all x_8, if x_8 were rich, then x_8 is a cashier, and that for all x_8, x_8 is not a cashier we can infer that for all x_8, x_8 is not rich. Finally, from the fact that there is at least one x_8 for which if x_8 reads a book, then x_8 is rich, and that for all x_8, x_8 is not rich we can infer that there is at least one x_8 for which x_8 will not read a book, which contradicts that For all x_8, x_8 will read a book. Therefore, the answer is no.