Could you please DON'T USE EXCEL formulas, and explain how to get Cost% of Zero Debt (after tax cost) and Cost% of Debt (after tax cost) by using calculator. Thank you

Preferred Stock and WACC The Saunders Investment Bank has the following financing outstanding. What is the WACC for the company? Debt: 40,000 bonds with a coupon rate of 4.9 percent and a current price quote of 106.5; the bonds have 15 years to maturity and a par value of $1,000.40,000 zero coupon bonds with a price quote of 21.8,30 years until maturity, and a par value of $10,000. Both bonds have semiannual compunding. Preferred stock: 135,000 shares of 3.5 percent preferred stock with a current price of $87 and a par value of $100. Common stock: 1,900,000 shares of common stock; the current price is $73 and the beta of the stock is 1.15. Market: The corporate tax rate is 23 percent, the market risk premium is 7 percent, and the risk-free rate is 3.6 percent