The figure is the amount of actual cash you are contributing to the LLC (other members are likely contributing to the LLC's capital as well). For example, if you took out a personal loan and are contributing the proceeds to the LLC, that would be a contribution of cash to the LLC.
An LLC member can also contribute property to the LLC which will generally require an input for the value of the property as the contribution to capital.
If you are unfamiliar with these terms and/or do not have a basic knowledge of pass-through entities and/or accounting for such entities, you should seek guidance from a tax and/or legal professional.
