The transaction of Xiaomi Bu Children's Shoes Store can be divided into two parts:

(1) The transaction between Xiaomi Bu Children's Shoes Store and the neighborhood: 50 yuan recorded a loss, with a loss of 1=-50.

(2) Xiaomi Bu Children's Shoe Store deals with young people: give young people a pair of shoes and 29 yuan cash. Because the actual loss of young people's shoes = cost = 15, the loss is 2=- 15-29 in the process of dealing with young people.

Therefore, the loss of Xiaomi Bu Children's Shoe Store in this transaction event = loss 1+ loss 2=-50- 15-29=-94 yuan.