Bill, please!

Accounting for expenses for a travel between the fellow travelers for calculation to determine how much someone who should.

On vacation often happens that pays not the one who bought it, and the one who is to have the money at the moment.
Some people in the group may be a family with a total budget and someone can be alone. Writing in a notebook and subsequent calculations require a time and can cause controversy.

The program supports the following types of payments:

- Proportional payments.
The amount that one has to pay depends on the participation rate.
Factor is the weight of baggage, the amount eaten muffins and the like.
Alternatively: a taxi or deck chairs rent payment on a beach.
In this case, adults may have a factor of 1, a child 0.5.

- Independent payments.
Everyone knows how much to pay, and pays for itself.
This could be, for example, bill payment at the restaurant.

- Transfer money.
Someone gave someone money.

When entering data once payment amount is calculated, which allows to check a bill.
At any time, you can calculate the current balance and the amount spent by each member.
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