a. Office Mart has assets equal to $123,000 and liabilities equal to $53,000 at year-end. What is the total equity for Office Mart at year-end?

b. At the beginning of the year, Logan Company's assets are $200,000 and its equity is $150,000. During the year, assets increase $70,000 and liabilities increase $30,000. What is the equity at the end of the year?

c. At the beginning of the year, Keller Company's liabilities equal $60,000. During the year, assets increase by $80,000, and at year-end assets equal $180,000. Liabilities decrease $10,000 during the year. What are the beginning and ending amounts of equity?