Profit: 960 * (1+20%) =1152.

Loss: 960 * (1-20%) = 768.

Total * * *:1152+768 =1820.

Price: 960+960= 1920

1920- 1820= 100

Loss 100 yuan.

Actually, I don't know much about it either. I borrowed it from other places. I wonder what this "1" stands for? It seems to be a matter of cost. In a word, the answer is right.