Calculate the operating margin: (operating income-depreciation)/sales Income Statement Data Sales 1200 Operating Income 150 35 Depreciation Interest Expense 25 Pretax Income 90 Income Taxes 35 Net Income after tax 55 Balance Sheet Data Fixed Assets 200 Total Assets 500 175 Working Capital Total Debt 125 Equity 250 Select one: O a. 15.5% O b. 5.6% O c. 8.6% O d. 10.6% O e. 9.6%