Priska Star, an entrepreneur, began the year with total assets of $120,000, and liabilities of

$70,000. During the year, she earned revenue of $140,000 and paid expenses of $30,000. She also

invested an additional $20,000 in the business and withdrew $60,000 for living expenses. How

much is the equity of the firm at year-end?

a. $90,000

b. $120,000

c. $130,000

d. $160,000

e. $100,000