Weight of fruits and vegetables sales: Minus Scale

Now many supermarkets like set up self-service weighing, weighing their own lovely customers, and then print out the price tag to pay – relative to the previous line to aunt weighing practices, this can save manpower and costs, but doesn't have the highest efficiency ... ... Is there a better way? Designer Youngsub Song, who says, Yes, that is the weight of fruit sales (Minus Scale):

The principle is very simple, there is a basket of tomatoes, for example, sales records initial weight, and then, every time a customer picking out tomatoes, sales counter will record the new weight, and to show the weight of tomatoes picked out, and then, when the pick is over, click on OK it will print out the price tag, for customers to checkout. --The moment a customer selected, repeat this process. Juicy Couture

Did you see? The sales units can be selected, weighed and print price steps in the same place, done on the same machine, so it can improve efficiency and reduce the time. Of course, this requires customers are highly conscious, or without fruits and vegetables with light print price tags, estimated that the supermarket was closed ... ...

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