Master Wang sells shoes, and the purchase price of a shoe is 45 yuan, and now it is sold at a loss,

This question has been asked many times, but it is actually very simple. Here's my previous :

Holistic approach: Other property that has not been exchanged is not counted.

Before all the exchanges, Master Wang's property was 80 yuan for a pair of shoes (40 yuan for one and 80 yuan for a pair) and 100 yuan for genuine coins (to be used to later return to neighbors). A total of 100 + 80 = 180 yuan.

After all the exchanges, Master Wang's property was no shoes, 35 yuan of real money (35 yuan for change).

All losses are $180-35 = $145.

Step-by-step method: the first step: the customer buys shoes and gives counterfeit money, and in this step, Master Wang gives shoes and gets counterfeit money, losing 80 yuan.

Step 2: Find a neighbor to exchange, give counterfeit money, get real money, to this step, earn 100-80 = 20 yuan.

Step 3: Give the customer change, give 65 yuan, to this step, the loss is 65-20 = 45 yuan.

Step 4: Pay back the money to the neighbor, to this step, the loss is 100 + 45 = 145 yuan.

Equivalence: Master Wang first exchanged 100 yuan of counterfeit money for 100 yuan of genuine money from his neighbor, and then returned 100 yuan of real money to his neighbor, so the equivalent between Master Wang and his neighbor was that no exchange was made. Therefore, Master Wang's loss is 80 yuan shoes + 65 yuan change = 145 yuan.

The result is the same for all three approaches.

The cost of a pair of shoes is 45 + 45 = 90 yuan, plus the 65 he gave to the customer for change, so a total loss of 90 + 65 = 155 yuan.

We can first assume that Master Wang's capital is 200 yuan, and it costs 90 yuan to buy a pair of shoes, leaving 200-90=110 yuan at this time. The customer buys shoes and asks Master Wang for 100 yuan, and Master Wang gives 65 yuan for change. At this time, the money in Master Wang's hand is 110 + 100-65 = 145 yuan.

In the end, the neighbor returned 100 yuan. Master Wang still has 145-100 = 45 yuan left. Compared with the original 200 yuan, it lost 155 yuan.

So the answer is $155.

The money that Master Wang loses is the money that customers make. Shoes 45 find change 100-35 So 65 + 45 110 you have a fixed mind.

Quite simply, if it was real money, how much did he lose? Isn't it 55? When you encounter fake money, do you lose another 100? The neighbor came out with real money, and when he went back with real money, he had a dozen soy sauces. He lost 55 in business, 100 in fake money, and 155 in total

Let's look at the cost first! Shoes 45 yuan 1, 45 * 2 = 90 yuan.

I found a neighbor and took 100 yuan, and then returned it to him, and the neighbor's 100 yuan was ignored!

So in the end, Master Wang gave away a pair of shoes for free, 90 yuan, plus 65 yuan for the customer. The total loss is 90 + 65 = 155 yuan.

155 yuan. Among them, Master Wang had no change to find a neighbor for 100 yuan, and because of the fake money, he paid 100 yuan to the neighbor, which is a trap, but there is no need to think about it, because the neighbor gave me Master Wang 100 yuan, and Master Wang gave the neighbor another 100 yuan, which is just offset.

Another trap: the purchase price of Master Wang's shoes is 45 yuan a piece, and a pair is 90 yuan.

So how much money has Master Qiu Wang lost now?

Algorithm 1: In fact, it depends on how much the customer takes and how much he loses.

So: 0 [Master Wang's income, because it is fake money, so the income is 0]--40*2-35) [55 of the money at a loss from the sale of shoes] = 155

Algorithm 2: The customer took a pair of shoes and took the change, and because the money given to Master Wang was fake, what the customer took away was a loss for Master Wang.

So: 45 * 2 [the cost price of a pair of shoes 90] + (100-35) [change 65 for the money taken by the customer] = 155

The purchase price of each pair of shoes is 45 yuan, selling for 35 yuan, and a pair of shoes will lose 10 yuan, followed by 100 yuan of counterfeit money, although it was exchanged to the neighbor, but it was still found to be 65 yuan, and finally the neighbor was paid 100 yuan, so it should be a loss of 10 + 65 + 100 = 175 yuan.

I was deceived by the customer of 65 yuan in cash and 90 yuan in a pair of shoes.

A total of 155 yuan.

Master Wang's principal is 90 yuan, minus 35 yuan for selling, and the loss is 55 yuan, so it seems that if the money is true, it will only lose 55 yuan, but the money is fake, and the neighbor will be paid 100 yuan, which is equivalent to a loss of 100 yuan, which is equivalent to a loss of 155 yuan, don't bother with the change, because the change is not Master Wang's money, it is equal to the capital of 90 + 100 = 190 yuan, 190 minus 35 yuan in so the loss of 155 yuan.

I like the conversion issue and look at the three conditions that are actually offered at the moment. 1. **Get 2 shoes and 65 yuan change. 2. The income and expenditure of neighbors will not be affected.

3. You 1 and 2 know that Master Wang lost 2 shoes and 65 yuan in change, because these were taken from Master Wang.

I turned the question into: Master Wang was stolen 2 shoes and 65 yuan, no problem, right? The cost price of each shoe is 45 for Master Wang. So Master Wang lost 45 * 2 + 65 = 155 yuan.

Income: 0 counterfeit money given by customers + 100 change changed by neighbors

Payout: 45 for shoes + 65 for customers + 100 for neighbors

In comparison, the loss is 110