Last year. Crystal Rock Holdings reported $510,000 of sales, $262.500 of operating costs other than depreciation, and $10,200 of depreciation. The company had $600,000 of bonds outstanding that carry a 7.2% interest rate, and its income tax rate was 40%. What was the firm's times-interest- earned (TIE) ratio? Your answer should be between 4.20 and 7.12, rounded to 2 decimal places, with no special characters.