<image> In this May, Xiao Ji Xin Hua Bookstore sold 4000 books. The right image shows the sales situation of various books.
(1) From the image, the most sold category is ____ books; the least sold category is ____ books.
(2) Detective books sold 1000 copies, accounting for ____% of the total book sales in May.
(3) Literary books accounted for 23% of the total book sales in May. The number of cartoon books sold in May was ____ copies.