18. Galvatron Metals has a bond outstanding with a coupon rate of 6.8 percent and semiannual payments. The bond currently sells for $1,870 and matures in 20 years. The par value is $2,000 and the company's tax rate is 35 percent. What is the company's aftertax cost of debt? A) 4.83% B) 3.47% C) 3.71% D) 5.11% E) 4.46%