What is Wulfurt Family Chocolates’ after-tax cost of debt on the notes payable and bonds? The interest rate on Wulfurt Family Chocolate's notes payable is 6.5%. The market value of the notes payable is equal to the value shown on their balance sheet which is 15376 and long term debt is listed at 67401. The interest rate on Wulfurt Family Chocolate's notes payable is 6.5%. Wulfurt Family Chocolates sold issuances of 1) a 10-year coupon bond which has a yield to maturity of 6.5%, 2) preferred stock, and 3) common stock on the open market.The market value of Wulfurt Family Chocolate's bonds is €54,800,000. Assume a 34% corporate tax rate. Please let me know if you need anymore info.