Adepartment store sells a pair of shoes with an 87% markup. if the store sells the shoes for 192.61 dollars then what is their non-markup price?

Based on what i know about mean, this doesn't add up.

John bought 5 lemons and used 2 of them for a salad how much did he use for.a salad . he used % of the lemons.

Statement: if two points are given, then exactly one line can be drawn through those two points. which geometry term does the statement represent? defined term postulate theorem undefined term