everything by hand is good for the brain! writing of course, but inducting a younger person working the till, into the dance of correct change, or an aproximation that leaves them with a float, and/or not getting a pocket full of coin, and watching the light go on as they activly get into the game of useing simple math in a practicle way for the first time, big grins all round, or some few mildly enraged and uncertain as to what just happened, this bieng a common experience as I use cash for most of my personal expendature, which more recently is getting comments from other customers and employees, but I like it, pay and be done. I also dabble in scrap and precious metals, back woods deals for a wide variety of primary building materials, supplys, feed, manufacturing equipment,etc, which is all done with cash, live, right now, on your feet, make a deal, be good with it, done and on to other things.