On July $1$ of the current year, the assets and liabilities of John Wong, DVM$,$ are as follows: Cash, $$10,511$; Accounts Receivable, $$8,657$; Supplies, $$1,943$; Land, $$24,405$; Accounts Payable, $$5,732.$ What is the amount of stockholders' equity as of July $1$ of the current year?