Lola turned the tablet around. A QR code filled the screen.

To help you properly, could you clarify your context? For example:

To the casual passerby in the congested streets of Caracas, it was just another "Punto de Venta" (PDV)—a corner shop selling arepa flour, cold sodas, and cigarettes. But the locals knew better. The "FULL" wasn't an advertising gimmick. It was a warning.

: Allows you to manage a "tab" for trusted customers, tracking their balances and payment history.

"Forty? It’s worth sixty!"

Allows businesses to grant and track customer credit, a common practice in local "abarrotes" stores.