Funds
From Kerbal Space Program Wiki
Funds will be introduced for version 0.24 and will limit the number of parts which can be used. Each part will cost a certain amount of money which can be partially returned after recovery from Kerbin. Another source of income are contracts.
The unit is not known, but the symbol does not resemble a monetary unit used in real life.
References
- “First Contract Playthrough” by Miguel (Maxmaps) uploaded on the official Kerbal Space Program channel released on the 11 July