Update nested layer using loop #Challenge

Question

I have MasterPart 1 which is the price of Rs-100 Now if I will change the price of 100 it suppose to change the price of all effected layer as you can see in below image.

 

it supposed to change the price of  all MasterPart 2 to 5 based on the price of Master Part 1

 

Than It supposed to change price of all 3rd level master part based on the second level

 

And it not defined how much inner it will be.