Cooking Techniques and Kitchen Gadgets

Last time I was at the supermarket, the cashier picked up my head of radicchio and punched in the code for red cabbage. The price came up as 70 cents.

I said, "Actually, that's radicchio, not red cabbage."

She voided it and punched in the correct code for radicchio. The new price came up as $5.50.

"Wow! That's expensive!" she said. "You should just get the red cabbage instead."

Get the red cabbage instead? Is she serious?

So what's behind this $5 difference between red cabbage and radicchio? Is it cabbage inflation? Is the Mafia getting kickbacks on radicchio sales?