I think it should be: just take the money and simulate it yourself. Fake money 5 yuan, neighborhood real money 5 yuan,; The cost of shoes 15 yuan, that boy took the real money from 29 yuan; The neighborhood found that the money was fake; 21 yuan left by the owner of the shoe store is returned to the neighborhood, and 29 yuan has to be pasted upside down. That is to say, the loss of the shoe store: a pair of shoes, 29 yuan taken by the boy and 29 yuan returned to the neighborhood, how much is the total?