Pretty much the title. Like, get those handheld scanners and attach them to the carts. I scan items as I put them in, roll up to a “register” where the cart is weighed and verified by a cashier. I just hand over the cash then leave. Or even better, install load sensors in the cart.
Usually I like to pack my groceries into my boxes as I get them into the cart. Keeps things orderly and neat and I also don’t buy more than I can carry home. But this means I have to unpack them to place on the belt then pack them all over again after paying. It would be kinda nice to just pay by the cart load.
I’ve been doing this for years! My local grocery has a little scanner you can take around with you, I carry 2 wicker baskets, scan items as I fill them, and then the self checkout lane reads a code from the scanner, I tap to pay, and walk home. It’s honestly seamless.