Automatic checkouts at the supermarket

Everyone thinks that I am technologically challenged.  However, I know how to go through the automatic checkout at Woolies supermarket.  Today I did have a little hiccup.  I had my rewards card upsidedown when I scanned it.  Don't do that, the machine hates it and then it goes crazy and the checkout lady has to come and rescue you.  Anyway, we managed to fix it and then I even put fruit through.  This is a little more challenging than most other groceries.  I also wanted cash out but forgot how to go about it (enter the lady again.)  I took money out the other day at Big W and it was fine, however today not so successful.  So all in all I did pretty well.  What you loses on the swings you gains on the round-a-bouts.  I embrace technology.  Well I embrace technology that I understand which actually means I really have no idea.