A girl goes to a shop and she buys a book there of rs 200, she gave a note of rs 1000 to t shopkeepker. t shopkeepker didn't have change so he goes to
another shopkeepker for getting change. the shopkeepker came back and give rs 800 back to the girl.
the very next moment the other shopkeepker came and he told the sopkeep A that the change he had taken from him of rs 1000 was duplicate so he wants his money back.find out the total loss of shop keep A?