You left a very crucial thing out of your equations. You looked at this like a mathematician in a lab. Let me show you the crucial factor you left out of your numbers and teach you something I hope makes you a better trader.
Very important
What you forgot about is that LFBG does not trade in a vaccuum it trades in the open markets. What this means....is that you forgot about all of us in your calculations. If we all see LFBG buying back shares we will all dive and buy more right alongside of them. So it is not just how many shares LFBG buys back....it's how much new buying it generates from us the public combined with their buybacks. So the buying pressure increases based on the companies triggering event of the buyback.