Aunt Liu is a salesperson. She said: "I sold both grade A and grade B for 60 yuan. One made a profit of 20%, and the other lost 20%. Is Aunt Liu right? Please calculate and explain.
刘阿姨是一位售货员，她说："甲等品和乙等品我都按60元钱卖掉了，一件赚了20%，另一件亏了20%，还不错，总算没有赔，刘阿姨说的对吗？请计算说明．
<result>5</result>