I was paying for 3 different small items and the c...

I was paying for 3 different small items and the cashier add to my bill another extra 3 small packages prepacked food. So in basket 3 and on the bill 6. I ask cashier where the 3 item come from but nothing only silence. She removed the items from the bill with out even say sorry.

Haw it happened when every item has to be scan through optical reader.
Only explanation is that the cashier has a way to add it manually extra to you bill. Say, if you purchasing about 35 items the extra 3 wouldn't be noticeable.
So watch your money in T&T. I don't trust them anymore.