In my opinion, it's a normal transaction. The shoe seller made six dollars. He was cheated of fifty yuan and lost fifty yuan, plus he earned six yuan, which can be counted as his loss of forty-four yuan; Of course, if this transaction is excluded, it can be calculated that he lost fifty yuan.

Zhang Tao, the core investment consultant of Guotai Junan Chongqing Branch, believes that the place where this topic is easy to mislead testers lies in the 50 yuan between the shoe store owner and the neighborhood. "They just exchange money, there is no transaction." Zhang Tao said that the owner's real loss was 29 yuan's money and a pair of shoes for young people. If calculated according to the cost loss, the loss of the shoe owner is 15+29=44 yuan, and if the profit that should have been earned is added, the loss is 44+(21-kloc-0/5). Chongqing business daily network