Very good idea to keep in touch with your readers. You know what that is, don't you? Ah, yes... a form of viral marketing. Keeping in touch allows you to notify them personally when your next book is out, so you are smart, David. Good job! Signed copies? Another great idea. Readers love to receive author-sigend copies. Even I enjoy that. I still get a thrill, and I now receive a lot of them. Once signed, they can stay. I won't give them away. They are special. So, again, good job.

You are welcome. As a writer myself, I don't want to be bogged down in the numbers. I'm not good at math anyway! ; )   Oh, I can calculate dollars and cents though. No problem there. When I was little, I spent hours counting coins. Stacking them, pretending to be rich, etc.