at the albertsons around where i live, there are little scanners you can carry around, which you use to scan your items as tou put them in your cart

when oyu walk in you scan your "albertsons preffered card" (dont worry they dont charge you for any of this) and a machine unlocks a scanner gun from its holder. the scanners are nice; they have screens which display an itemised list with individual prices, and a running subtotal. after you get your scanner there is a holster type thing on the handles of the cart which the gun fits into. as you are shopping you casually scan your items and throw them into bags. this also works for produce that need to be weighed (each variety of produce has its own 4-5 digit which you enter into a scale which prints out a barcode and sticker for you to scan. after completeing you shopping you scan a special barcode on a big sign that says finish shopping. you leave your gun. you go up to any self checkout and scal your albertsons card, it fetches your items from the gun, you pay, and ur outta there