This problem extends the scientific problem of our third grade. Please look at the topic and say that Mr. Zhang took 500 yuan to the store to buy schoolbags, and found that the price of schoolbags was more expensive than that of 25 yuan. Note that 25 yuan is much more expensive than 25 yuan, and those above 25 yuan are all above 25 yuan, that is, 25 yuan. Everyone should understand this, right? I bought a 17 schoolbag, but I haven't paid back the money. What does this mean? After selling the 17 schoolbag, the remaining money can't be used to buy this schoolbag, which means that the remaining money can't exceed that of 25 yuan. That's good. Twenty-five dollars is 29, 28, 27, 26. Of course, if he is talking about 25 yuan's locker, you can also say 25 yuan, so this is the final answer.