Please help me to solve this problem .

For this problem, you would have to set the amount of money as a variable. 

They key is to essentially write a solvable equation to figure it out!

In fact, my parents used to give me a lot of problems similar to this one :)

So let's let that be x. 

From the problem, we can get the equation $\frac{2}{5}x+\frac{1}{7}(x-360)+360=x$. 

We have $\frac{2}{5}x + \frac{1}{7}x - \frac{360}{7}+360 = x$. Combining like terms and isolating x, we have $\frac{2160}{7}=\frac{16}{35}x$. 

We multiply both sides by 35/16, and we have $\frac{35}{16} \cdot \frac{2160}{7} = x$. 

So we have $x = 675$

$675!

Thanks!