Last Puzzles (Simple Interview Puzzle)

I purchases perfume from a store and gave him a thousand rupee note. The perfume cost Rs.300. Since the store person have no change, he gets the change from next shop and return me 800 rupees. After a while, the next shopkeeper comes and told the 1st shopkeeper that the note is a fraud and takes his money back. How much loss does the 1st shopkeeper have to bear ?

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