To help finance a major expansion, Castro Chemical Company sold a noncallable bond several years ago that now has $20$ years to maturity. This bond has a $9\mathrm{.}25\%$ annual coupon, paid semiannually, sells at a price of $$1,025,$ and has a par value of $$1,000.$ If the firm's tax rate is $40\%,$ what is the component cost of debt for use in the WACC calculation? Do not round your intermediate calculations.