Olmsted's outstanding bonds are priced at $1,023 and mature in 13 years. The bonds have a face value of $1,000, a coupon rate of 6.5%, and pay interest annually. The firm's corporate tax rate is 21 percent. What is the beforetax cost of debt? 0 4.28 percent 0 4.93 percent 7.15 percent 6.50 percent 6.24 percent