Your firm is considering purchasing a machine with the following annual, end-of-year, book investment accounts Purchase Date Gross investment Less: Accumulated depreciation Net investment Year 1 $62,000 Year 2 $62,000 Year 3 $62,000 Year 4 $62,000 62,000 $62,000 31,000 4:200 46,500 $62,000 $46,500 $31,000 $15,500 The machine generates, on average, $6,700 per year in additional net income What is the average accounting return for this machine? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) AAR -%