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Before-tax cost of debt and after-tax cost of debt Personal Finance Problem David Abbot is interested in purchasing a bond issued by Sony. He has obtained the following information on the security: Sony Bond Coupon interest rate 5.5% Years to maturity 10 Par value $1000 Cost $930 Corporate tax rate 30% Answer the following questions: a. Calculate the before-tax cost of the Sony bond using the bond's yield to maturity (YTM). b. Calculate the after-tax cost of the Sony bond given the corporate tax rate