Aaron Shepherd's Plan B (an update to POD for profit).
Selling to B and N with a 55% discount from lightning source should make the books appear with a 40% discount off the list price. Amazon generally matches those discounts.
The list price will be $44. 44 * 0.6 = 26.4
Using the Createspace royalty calculator, $44 with a 300 page book produces a royalty of ~$22.
Amazon discount don't reduce Createspace royalties. I may be overlooking something, or some part of the plan might fail of course.