puzzel

Dear All

Crack this below puzzle and the answer will be the password to open the
attached XL sheet. Excel sheet is a sheet of all the people who were
able to crack this puzzle. Pl. add your name and forward to others.

This is a story of four boys........ ......... . Chinku, Dinku, Pinku &
Tinku.
One day all of them decide to save their money in a bank.......they
select
a bank called " Lena Bank "
The bank's specialty is: In every month the money gets doubled..
In 2nd month, Chinku withdraws 100-Rs from bank........ ...
In 3rd month, Dinku withdraws 100-Rs from bank........ ......
In 4th month, Pinku withdraws 100-Rs from bank........ ....&
In 5th month, Tinku withdraws 100-Rs from bank & their balance in the
bank
becomes zero........ ......... ...

How much amount had the boys put in the bank?

Answer is the password of the excel sheet....... ...

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