Using a markup of 35% of cost, a store priced a book at $8.91.

(a)	What was the cost of the book?
(b)	What is the markup as a percent of selling price?

(a) The cost of the book was

$nothing.

(Round to the nearest cent as needed.)

(b) The markup as a percent of selling price is

nothing%.

(Round to two decimal places as needed.)