Dundee Co. reports the following data for the month of February:

Total sales, $126,000

Total contribution margin, $105,000

Total fixed expenses, $63,000

If management expects March sales to increase by 12%, what is the expected percentage increase in net operating income for March? (Assume the company's cost structure remains constant for the month of March).

Group of answer choices

a.12%

b.36%

c.30%

d.20%