Shopkeeper and duplicate note
A lady buys goods worth Rs. 200 from a shop (shopkeeper selling goods with zero profit) lady pays with a 1000 Rs note to the shopkeeper. He gets change from the next shop & keeps 200 for himself & returns 800 to the lady. After sometime the next shop owner returns the 1000 Rs. note saying it is fake & takes the money back. How much loss did the shopkeeper suffer?