Group Expense Manager

This tool can be used when you want to calculate how much you need to give or get from other group members.
For example 5 people go out on a trip.Say person A,B,C,D,E.
And Expenses are like:
1. Trip road cost : 2000 bucks (A paid 1000,B paid 500,C paid 500)
2. A,B had snacks : 50 bucks (A paid 50)
3. B,C,D had drinks : 150 bucks (B paid 150)
4. hotel cost : 2500 bucks ( C paid 2500)

Here A,B,C,D,E are added to person list file.
There are 3 different groups:
G5:A,B,C,D,E;
G2:A,B;
G3:B,C,D;

For case 1 there are 3 transaction
A paid 1000 in G5 group : G5,A,1000
B paid 500 in G5 group : G5,B,500
C paid 500 in G5 group : G5,C,500

For case 2 there is 1 transaction
A paid 50 in G2 group : G2,A,50

For case 3 there is 1 transaction
B paid 150 in G3 group : G3,B,150

For case 4 there is 1 transaction
C paid 2500 in G5 group : G5,C,2500