If ABC healthcare has a 2018 net income of $8,572,000, an operating income of $3,340,000 from total revenues of $117,476,000, and total operating revenue of $112,244,000, what is its total and operating margins respectively?
a. 6.9% and 3.0%
b. 7.3% and 3.0%
c. 3.0% and 7.1%
d. 7.3% and 7.1%