First-year math problem ~ see if you are suitable for stock trading?

Question 1: The owner of the software store lost 44 yuan's money in this transaction.

Question 2: On the basis of the original question, if the neighbor has never found out that the money is fake, then the boss will take it and get 6 yuan.

Question 3: On the basis of the original question, if the boss catches a young man the next day, ask him for 50 yuan money.

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