Today was waterproof jacket shopping day. First call was Evans HQ where I finally tracked down a suitable offering from Altura that didn't have too much in the of reflective stuff. However they didn't have my size. Second call was Halfords. What's this? An Altura something or other in my size and nice colour. Sixty quid? Hmm, but it's on the rail marked 30% off and I have ctc discount card. Wander over to the till, where the nice lady scans it, frowns, gets out phone, scans it again, pokes at her phone and says she's no good at mental arithmetic. Now clever clogs here has worked out that 30% of 60 quid is 18 quid, so it'll be 42 less ctc discount. But she's saying the discount is 12.60. I start to explain that 30% is 18 quid to be interrupted with her saying 30% of 42 is 12.60.
I think the till automatically dedeuted 30% then she did it again. That's 51% discount. It would be pushing my luck to ask for the ctc discount , so paid for my HALF PRICE jacket and left.