Gul Corp. consider the following structure optimal: 40% debt, 50% equity, and 10% prefered stock. Guls current bond sells in market for $1150. The bond carries an annual coupon payment of 12% of face value which is paid in two semiannual payments. The bond will mature in 15 years and face value is $1000. The bond annual yield to maturity is 10.04%. The firms marginal tax rate is 40%. What is guls after tax annual cost of debt