Cost of debt using both methods? (YTM and the approximation formula) Currently, Warren Industries can sell 20 dash year 20-year, $1,000-par-value bonds paying annual interest at a 14% coupon rate. As a result of current interest rates, the bonds can be sold for $1,030 each before incurring flotation costs of $30 per bond. The firm is in the 40% tax bracket. a. Find the net proceeds from the sale of the bond, Upper N Subscript dNd. b. Calculate the bond's yield to maturity? (YTM) to estimate the before-tax and after-tax costs of debt. c. Use the approximation formula to estimate the before-tax and after-tax costs of debt. a. The net proceeds from the sale of the bond, Upper N Subscript dNd?, is $nothing. (Round to the nearest dollar.) b. Using the bond's YTM, the before-tax cost of debt is nothing %. (Round to two decimal places.) Using the bond's YTM, the after-tax cost of debt is nothing %. (Round to two decimal places.) c. Using the approximation formula, the before-tax cost of debt is nothing %. (Round to two decimal places.) Using the approximation? formula, the after-tax cost of debt is nothing %. (Round to two decimal places.)