They have color coded stickers that correspond to 30-70% off each item. So if you want to figure out how much it actually costs you have to do the calculation in your head.
What makes this so obscene is that they actually individually print the original price on that colored sticker; it's not like it would be any less convenient for them to put down the actual new price.
They do have giant charts at the end of every aisle that spells out basically every permutation possible. I don't think it's intentionally confusing as in the comic, however. They're trying to anchor you on "30% off!" rather than 30% off of $145 ($101.50). I've definitely seen people spend who are looking at two pairs of shoes who end up buying the more expensive pair just because it's some percentage off.
They have color coded stickers that correspond to 30-70% off each item. So if you want to figure out how much it actually costs you have to do the calculation in your head.
What makes this so obscene is that they actually individually print the original price on that colored sticker; it's not like it would be any less convenient for them to put down the actual new price.