A small book costs about $3.30 to deliver. Why not use Createspace?

Createspace is the "publish it yourself" arm of Amazon.  Amazon's core business is "shipping things" and authors might want to create books and ship them to friends and radio shows.

Here is an example of the costs:
10 copies at about $2.40 each, plus $8 shipping =  $33 or about $3.30 per book
The book might retail on Amazon for $6 each.

This is global:  Amazon.in offers the book, too.

Here's the book on Amazon in the USA

The cost is $6 retail on Amazon