How Much Can I NOT Save?

The fact that Shop Rite Supermarket was selling fresh lemons last year at 4 for $1.99 was not surprising. But the fact that lemons are normally 50¢ and telling me that by buying four I could save 0¢ (and highlighting the fact) makes me wonder about the intelligence of their sign designer.

Yes, technically I know you would save one cent by buying four.