Requirement1:
As a wallet owner, I would like to be able to take a specified amount of money out of the wallet.
Requirement2:
- Given preferred currency is Rs.,
When my wallet has Rs.50 & $1, then the sum of money in the wallet is Rs. 124.85 - Given preferred currency is $,
When my wallet has Rs.74.85, $1 & Rs. 149.7, then the sum of money in the wallet is $4
Requirement3: As a wallet owner, I would like to be able to put money into my wallet so that I can take it out later.