Great Seneca Inc. sells $100 million worth of 25-year to maturity 13.76% annual coupon bonds. The net proceeds (proceeds after flotation costs) are $992 for each $1,000 bond. The firm's marginal tax rate is 30%. What is the after-tax cost of capital for this debt financing?
Round the answer to two decimal places in percentage form.
You should use Excel or financial calculator.