a shopkeeper buys two articles for rs . 1000 each and then sells them , making 20 % profit on the first article and 20 % loss on second article . find the net profit or loss percent ?
"profit on first article = 20 % of 1000 = 200 . answer : a"
multiply(divide(multiply(subtract(add(multiply(divide(const_100, subtract(const_100, 20)), 1000), multiply(divide(const_100, add(const_100, 20)), 1000)), add(1000, 1000)), const_100), add(multiply(divide(const_100, subtract(const_100, 20)), 1000), multiply(divide(const_100, add(const_100, 20)), 1000))), const_100)