A bookseller has two display windows. She plans to display 5 new fiction books in the left window, and 3 new non-fiction books in the right window. Assuming she can put the three fiction books in any order, and separately, the three non-fiction books in any order, how many total configurations will there be for the two display windows?  Select the correct option.
A) 240  B) 720  C) 144  D) 336  E) 420
Two displays books could be arranged n! # of total arrangements are combinations multiplied together,   5!*3! =120*6= 
<gadget id="calculator">120*6</gadget>
<output>720</output>
720   Answer is 720
<result>B</result>
A bookseller has two display windows. She plans to display 5 new fiction books in the left window, and 3 new non-fiction books in the right window. Assuming she can put the three fiction books in any order, and separately, the three non-fiction books in any order, how many total configurations will there be for the two display windows?