Money in is the recurring income in the scenario. Money out includes recurring expenses, debt payments and savings or investment contributions. Remaining is Money in minus Money out for the selected period.
A positive Remaining figure means the scenario has money not yet allocated. A negative figure means the entered commitments are larger than the entered income.
Worth knowing: Remaining is not automatically spare spending money. Annual costs, missing items and real-life variation may still need to come from it.
What to try next: If the figure surprises you, check the frequency of the largest items first.