Solution: Let's assume that there are X science books and Y story books.

De: x/y=2/5 x=2/5y

(x+360)//y=5/8

3.2y+2880=5y

1.8y=2880

y= 1600

x=2/5* 1600=640

640+360+ 1600=2600 (Ben)

A: One * * * has 2,600 copies.