Calculator for use by customers when making purchases in a super-market or store

摘要

The calculator enables the customer to enter purchases and their cost to monitor accumulating value. A computer is taken on entry into the shop/supermarket. The customer then inputs a customer card and enters the customer secret code via the keyboard, in order to activate the computer. The goods are selected for entry into the computer by placing the computers reader over the goods bar-code. When all purchases have been selected the customer present his card at the delivery check-out. The check-out assistant then enters the card and a purchase slip is printed out for the customer who pays for the goods by one of various payment methods. The store then promises to deliver the goods during the day in which the purchases are effected.