Ok you goof, your math is all wrong. 9$ x 3 does equal 27$, but why add 2 and not subtract 2? 9 x 3= 27 - 2 for tip = 25, hence a 5$ discount from 30$ equals 25$. They truly only got a 3$ discount because they gave away 2$.
The only reason this is a joke is because its not right... The...