The balance sheet for Schultz Bone Company at December 31, 2009 had the following account balances:

Total current liabilities (non-interest-bearing) .........$450,000

Bonds payable, 6% (issued in 1982; due in 2013) ........750,000

Preferred stock, 5%, $100 par ...............300,000

Common stock, $10 par ..................750,000

Premium on common stock ...............150,000

Retained earnings .....................600,000

Income before income tax was $200,000, and income taxes were $80,000 for the current year.

Required

Calculate each of the following:

a. Return on assets (using ending assets)

b. Return on total equity (using ending total equity)

c. Return on common equity (using ending common equity)

d. Times interest earned