First, it shows the average sale price for a hardcover as $26. That hasn't been the real price for quite some time, and it was never the _average_ price.
Second, the infographic shows 2 slices as "retailer profit" and "publisher profit". That is not profit. It is income. Profit is what you have left over at the end of the year. Also, while the $13 is about the right percentage of the $26 for the retailer's cut, hardly any retailer actually gets the $13. Most price the book for a heck of a lot less.
But I do like that they included (later in the graphic) an estimate of how many ebooks you'd need to buy to pay off the price of a Kindle. I'm going to use it elsewhere.