Leah and Cathy, Inc. had net income of $180,000 with a net profit margin of 0.65 and a tax expense of $64,000. They had no interest expense. Using this information, what was L & C's operating profit margin?

Select one:

a. Not enough data to solve

b. 0.23

c. 0.74

d. 0.36

e. 0.48

f. 0.88

g. 0.65