Balance sheet and income statement data indicate the following: Bonds payable, 6% (due in 15 years) $1,200,000; preferred 8% stock, $100 par (no change during the year) $200,000; common stock $50 par (no change during the year) $1,000,000; income before income tax for year $320,000; Income tax for year $80,000; common dividends paid $60,000; preferred dividends paid $16,000. Based on the data presented above, what is the number of times bond interest charges were earned (round to two decimal places)? Please show and explain steps.