All in a daze work:

 I finally convinced myself that I was going to have to go to the grocery store, as there was next to no food  in the house, all the Christmas leftovers gone. It was still daylight when I overcame my apathy and left for the store. I only planned to buy a few items, but as usual the number of items bought increases. I no longer bother much with coupons, but I had one for $1.00 and another for $1.25 for items on my list, so I handed them to the cashier, along with bottle return receipts totaling $4.80, and inserted my credit card as payment for my purchases. As she was handing me my receipt, the cashier, when addressing her cash register, suddenly noticed that Oops! she had "forgotten to deduct the coupons." She didn't know how to handle that situation, so she called for help. One employee appeared, and then another, who told me I would have to go to the service desk. So I did. I was asked to insert my credit card again, to certify whatever was required, as to the status of my purchase. Next, I had to retrieve the coupon items from the bag on my cart, and present those items at the desk. Then, if I wished to pursue the matter, I was asked to go to the side of the desk, where another employee said she would need to cancel and re-bill each purchase relevant to each coupon. So I inserted my credit card either 2 or 4 more times, and I guess the matter is resolved. Not being an accountant, I can only guess. 

  I recall in similar circumstances at the same store, the employee who was 

called for help would just reach into the cash drawer of the register there and pay out of petty cash funds the amount owed to the customer. Times have changed. The new process is time consuming. It was dark when I got home.