Given the following information, what is the times interest earned ratio?

Fixed assets (net) at year-end	$400,000
Average fixed assets	450,000
Total assets	500,000
Long-term liabilities	300,000
Total liabilities	350,000
Total stockholders' equity	250,000
Total liabilities and stockholders' equity	500,000
Interest expense	5,000
Income before income tax	150,000
Net income	100,000

a.30

b.20

c.21

d.31