没有经济头脑的人

I took Grace and Emory for a birthday party. On our way back, Emory told me that one of local restaurants provides free pico.

Then Grace asked:

--What does free mean?

Emory answered:

--That means you don't have to pay for that.

--But you can make them paid, right?

--Grace! You don't want to waste your money ～～～～～～～～～～