It is Saturday, the line is six deep, and the reader is slow enough that people tap twice.
1
Stock comes down safely
Tracked items decrement in a way that cannot oversell, so the last propane tank cannot be sold twice.
2
Double taps are absorbed
A repeated submit does not create a second order or a second charge.
RegisterDrawer open
Tap a product to start a sale.
Total$0.00
Try it
Tap a few products to ring up a sale, then charge it to the site.
3
Void when you need to
A wrong order is voided and stays in the record, so the shift report still reconciles.
What that saves you
- No refund calls on Monday
- No phantom stock in the store
- A drawer that balances after a rush