1 Q1. (25 marks) The Royal Inc. is currently in the business of making kitchen cabinets. It has $400,000 in outstanding bonds with a coupon rate of 8% and a yield-to-maturity of 7.5%. The company is seeking additional financing so it can start a new venture, which involves the sales and installation of patio rooms, including spas and hot tubs. Its biggest competitor, who specializes solely in patio rooms, has $600,000 in outstanding bonds with a 9% coupon rate and an 11% yield-to-maturity. Royal's marginal tax rate is 35% and the competitor's marginal tax rate is 34%. What after-tax rate cost of debt should the Royal Inc. use in its WACC calculation? Which source of capital structure is likely to provide more tax-related benefit? (Show detailed calculations)