I went to my local tesco store and went to the express till as I only had a couple of items, scanned them through, put them in the shopping bag. The voice asked me are you paying by cash or credit/debit card, as I only had a couple of items I pressed cash, looked down to see where I need to put my coins started to put them only to notice the balance was not going down. Funny I thought wants going on after looking again I was only putting my coins in "the coupons in" tube. I was totally embarrassed to say the least. Brain Fog it got me this time but it won't again I hope. I quickly gave the rest of the amount owed and got out of the shop as quickly (slowly) as my legs would carry me. Think I will leave it a couple of weeks before I go back in there hopefully they will have forgotten me by then .