Payment methods: cash, card, and QR code

The Register supports three payment methods.

Cash:
1. Select "Cash" in the payment screen
2. Enter the amount tendered — the system calculates change automatically
3. Click "Complete Sale" — the order is marked paid immediately and the cart clears

Card / Mobile (QR code):
1. Select "Card" or "Mobile Pay" in the payment screen
2. Click "Charge" — a QR code appears on screen
3. The customer scans the QR code with their phone and pays via Stripe
4. Once payment clears, the Register automatically marks the order paid and resets the cart

The QR payment page at /retail/pay/:orderId shows the cart items, total, and a Stripe checkout — no app install required on the customer's side.

If the Accounting module is enabled for your org, every completed sale is automatically posted to the general ledger as a retail revenue journal entry.