A company borrows $800 million at an interest rate of 7.6% per annum. It pays taxes at an effective rate of 35%.
(a) What is the tax shield if the debt is permanent at $800 million?
(b) What is the tax shield if the debt is repaid after 5 years?
(c) What is the tax shield if the company expects to keep the debt ratio constant and the return on assets is 10%?