Answer:
A) 4.51%
B) 3.47%
Step-by-step explanation:
The pretax cost of debt will be the yield to maturity of the bonds.
YTM = {C + [(F - P)/n]} / [(F + P)/2]
- C = 4%/2 = 2% ⇒ 20
- F = 1,000
- P = 920
- n = 24 years x 2 = 48
YTM = {20 + [(1000 - 920)/48]} / [(1000 + 920)/2]
YTM = 21.67 / 960 = 2.257% x 2 = 4.51% annual
pretax cost of debt = 4.51%
after tax cost of debt = pretax cost x (1 - tax rate) = 4.51% x (1 - 23%) = 3.47%