During the year ended December 31,2012 , Bjornstad Corporation had the following results: Sales revenue $$\$ 267,000$$; cost of good sold $$\$ 107,000$$; net income $$\$ 92,400$$; operating expenses $$\$ 55,400$$; net cash provided by operating activities $$\$ 108,950$$. What was the company's profit margin ratio?
(a) $$40 \%$$.
(b) $$60 \%$$.
(c) $$20.5 \%$$.
(d) $$34.6 \%$$.