Esra measures the side lengths of a rectangular cardboard with a perimeter of 320 cm using a rectangular bookmark and wants to calculate the side lengths of this bookmark. Esra measures that the long side of the cardboard is 10 times the long side of the bookmark and 25 times the short side of the bookmark, and calculates that the short side of the cardboard is 15 times the short side of the bookmark.
Accordingly, what is the perimeter of the bookmark in cm?
A) 20
B) 24
C) 28
D) 32
E) 36