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Student develops automatic billing trolley prototype Updated: Updated: Share Article AAA The prototype of a shopping trolley fitted with a device to calculate the bill as one picks up goods, developed by a school student in Karur, promises to save not just time, but also add more value to the shopkeeper’s stock maintenance. S.S. Vikas, a class 11 student of Sri Sankara Vidyalaya in Karur, has developed the model that uses radio-frequency identification (RFID) tags and a small scanner fitted to a shopping trolley to help customers calculate the amount they are spending per item. “I started working on this project two years ago, when in Class 9. At that time, my aim was to simply reduce the time shoppers spent waiting to be billed for their purchases. Since last year, with lockdown and social distancing norms, my prototype will actually be a safer way to shop if it is adopted commercially,” Vikas said in a telephone interview. ....