Cullumber Industries has 8 percent coupon bonds outstanding. These bonds have a market price of $962.42, pay interest semiannually, and will mature in six years. If the tax rate is 35 percent, what are the pretax cost and after-tax cost of this debt? (Round intermediate calculations to 4 decimal places, e.g. 1.2514 and final answer to 2 decimal places, e.g. 15.25\%.) Pre-tax cost % After-tax cost %