4 Days Challenge - Costs and gains

While I'm not expecting to have any kind of profit with this challenge (even though I will be working hard so that can happen), I think a very good exercise is to monitor every cost and gain I make with it. This way I can get in the habbit of recording every business finance.

Here's my registry at the moment:

Quantity	Description	Price	Total
1	Google Play - Developer Registration Fee	19.44 EU	- 19.44 EU
1	.pt Domain	14.76 EU	- 34.2 EU

At the moment I only had costs, as expected, it is impossible to set things up without some amount of money (very little in this case).

I also have some expectation set:

At least 10 downloads from each free app.

At least 1 download from each paid app.

And in the long run I would like to have the total field in the table at green ;)

How about you guys? How do you organize your business finances?