How you know you're getting screwed buying nuts expensive moisturiser:

Woman 1: So you don't need to use much at all. Just one pump and this bottle should last eight months.

Me: Oh yes wow that is impressive.

Woman 2 (walking up): That stuff's great.

Me: Uh Huh.

Woman 2: You only need a couple of pumps and it'll last you three months.

Me: Ah.