Johnny's Car Repair shop started with total assets of $60,000 and total liabilities of $40,000. During the year the business recorded $100,000 in car repair revenues, $55,000 in expenses, and dividends of $10,000. Stockholders' equity at the end of the year was:

a. $45,000

b. $65,000

c. $55,000

d. $35,000

e. None of the options listed