Exercise 15-20 Presented below is information from the annual report of Bonita Plastics, Inc. Operating income Bond interest expense $540,300 120,400 419,900 201,820 $218,080 Income taxes Net income Bonds payable Common stock Retained earnings $860,000 792,000 368,000 (a) Compute the return on common stockholders' equity and the rate of interest paid on bonds. (Assume balances for debt and equity accounts approximate averages for the year.) (Round answers to 1 decimal place, e.g. 16.8%.) Rate of return on common stock equity Rate of interest paid on bonds payable (b) Is Bonita Plastics, Inc. trading on the equity successfully