Mind and Solve Puzzle -ANSWER AND ENJOY WAIT FOR ANS?

Mind and Solve Puzzle -ANSWER AND ENJOY WAIT FOR ANS?

Mind Puzzle

Solve puzzle & Check my name inside......... Hi, 
Since your brain is fresh, you can work out the following puzzle

>>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...................... 
>>Give your brain cells some food........

click on link for excel file and download it online: https://drive.google.com/file/d/0B-5fBEPbZMB4OFpnX2hxSzFoVGM/edit?usp=sharing