At the end of the year, Cramer University held assets of $$15,000,000$ and recorded $$9,000,000$ of liabilities $($including deferred revenues of $$300,000).$ What is Cramer's net assets balance?

A$.$ $$5,700,000$

B$.$ $$6,000,000$

C$.$ $$6,300,000$

D$.$ $$15,000,000$