Okay, so this is my first try at commit and submitting a pull request.

I mainly did three things in this version:
1. Allow to switch between fields using the tab button.
2. Allow to hit enter when done typing in data.
3. Fixed a bug with the currently allocated money field. The parsing was not working correctly with decimals and integers. It should work fine now.
Okay, now I need to figure out how to exit vim... BRB