Wandering around at the annual church fete, I spotted a bubbly Girl Scout standing beside a table covered in plates of delicious looking cookies.

“Please buy some cookies from me!” she begged.

“It’s for the charity appeal.”

“How much are they?” I asked.

“They’re £5 a dozen, except these two kinds over there. They’re £6 a dozen.”

Figuring there must be something special about the plates of £6 cookies, I asked why that was.

“Well, those over there are all gluten-free,” the little girl replied.

“And what about the others?”

She beamed innocently, “Oh, those cookies are just overpriced!”