My KDP Select Experience--with numbers

I wanted to be open about this process, so I'm giving the exact figures. Sales of my first mystery, Haunting Refrain, had fallen steadily, going from 16 eBooks sold in June to 2 in October. In anticipation of Cold Comfort coming out in December, I did a little promotion for it and reduced the price to .99. It sold 5 at $2.99 and then 10 copies at .99, almost enough to buy a Big Mac. In January I