It means “friend of the court”. The person is not a party to the case in any manner. His sole purpose is to assist the court by providing substantial information or insight for the smooth disposal of the case.
A budget is an estimation of revenue and expenses over a specified future period of your time and is typically compiled and re-evaluated periodically.
Reasonable doubt is a legal standard of proof necessary for validating a criminal conviction. Principle of reasonable doubt has higher leverage than the balance of probabilities.
When necessary or needed.