Vista Camera Services started the year with total assets of $80,000 and total liabilities of $40,000. The revenues and the expenses for the year amounted to $120,000 and $70,000, respectively. During the year, the company did not issue any common stock, but it distributed dividends of $60,000. What is the amount of stockholders' equity at the end of the year?
	A. $70,000
	B. $120,000
	C. $30,000
	D. $60,000