Your firm is considering a new investment proposal and would like to calculate its weighted average cost of capital. To help in this, compute the cost of capital for the firm for the following: a.A bond that has a $1,000 par value (face value) and a contract or coupon interest rate of 10.9 percent that is paid semiannually: the bond is currently setting for a price of $1,129 and will mature in 10 years. The firm's tax rate is 34 percent. If the firm's bonds are not frequently traded, how would you go about determining a cost of debt for this company?.