5 people belong to a book club each month they choose a book

5 people belong to a book club each month they choose a book to read at the end of the month they all get  together to discuss the book .Now they have to pick a new book for the next month .the members of the club chose a $ 23.00 book that was on sale .If they bought 2 books at full prices they could   get 50% off each additional copy hoe much would each prson have to pay to get their own copy of the book?.