But what you did was the equivalent of telling a friend "Oh yeah, going to the zoo costs $12.50 per person". It's disingenuous at best. Your friend will quite r

But what you did was the equivalent of telling a friend "Oh yeah, going to the zoo costs $12.50 per person". It's disingenuous at best. Your friend will quite rightly believe that if they go there with their family of 5 it will cost them $62.50 instead of costing $50.