A bookstore initially has 200 books. The owner discovered that 15% of the books were damaged and had to be removed. After removing the damaged books, the remaining books were sold to three customers. Customer A bought 60 books, Customer B bought twice as many books as Customer A, and Customer C bought the rest of the books. How many books did Customer C buy? Let's think step by step and output the final answer within \boxed{}.
user