About that mirror. You may be right. Yesterday we popped into Sainsbury to get a bottle of fairy washing up liquid. We bought a 900ml bottle that was marked at £2.00 on the shelf.
On scanning it through the till, it reflected that the bottle cost £10.75. Called over the lady and she said it was because we had taken it out of a 6 pack? I told her that it was a stand alone bottle.
She then disappeared and came back with two smaller bottles and told us that they were the equivalent of the 900ml bottle. We accepted this and scanned them and they were £1 each however the weight was 340ml.
Called her over again and explained that 2 x 340 does not add up to 900. Anyway left without buying the dishwashing fluid.
We are now too scared to go for lunch in case they charge us £100 for a sandwich and my card does not work! LOL!