This app can connect to this weighing scale (http://www.amazon.in/gp/product/B00YFRDPQ0?keywords=meezan&qid=1448992822&ref_=sr_1_2&sr=8-2) with the help of server provided by meezan.
Sale log can be archived for any previous day, update item details stored on scale from this app, and update price of items as a whole easily.