How much money did Master Jiang lose in one day?

Just losing 200 yuan of fake money, this question has three formulas:

1. The relationship between Master Jiang and the customer is equal: meat money 36*4+change 56=customer Give (two hundred yuan) fake money;

2. There is equality between Master Jiang and his neighbor: Master Jiang gives (two hundred yuan) fake money = the neighbor gives 200 yuan real money;

3. Because the bank confiscated the real money that Master Jiang promised to compensate his neighbor: Master Jiang gave his neighbor 200 yuan in real money, but the neighbor gave nothing more, so there is a loss of 200 yuan.

The key to this question is that fake money can be regarded as shells, just a symbolic number for exchange. Real money is a number, and fake money is even more a number.

There is another simple calculation: regardless of neighbors and business, if you receive 200 yuan in fake goods, you will lose 200 yuan in compensation.

As for the process, the purchase price is 48 yuan and the selling price is 36 yuan, per catty and kilogram, change, money exchange, and bank confiscation are all confusing and additional factors that are not considered this time, why not Even if you have already made enough money by considering this as a sale, what if you buy some more and make a little more? Why not deduct rent, water and electricity bills? Why don't we count the economic benefits brought by his honesty and compensation for fake money? So as long as both parties think they are equal during the transaction, it is a transaction of equal value at that time. If any problems are discovered, such as the (two hundred yuan) fake money in this question, the loss is the 200 yuan real money