Self publishing using amazon kdp

This is how much I make selling each graphic novel using kdp.amazon.com. For months I was struggling to get the price of this printing down. It was around $50 when I first uploaded it. Now I've got the sales price down to $29.99 and I get a $5.20 royalty on every book I sell. This is a massive book. It's over 432 pages of fully illustrated drawings. The way I got the price down is I chose standard color interior with white paper. Choosing premium paper will up the cost a lot. So let's take a look at the quality of the prints. The colors aren't as saturated as the premium paper, but I sort of like the faded look to give it that comic book feel.