Suppose ECB from Example 16.3 borrows $2 billion by issuing 10-year bonds. ECB’s cost of debt is 6%, so it will need to pay $120 million in interest each year for the next 10 years, and then repay the principal of $2 billion in year 10. ECB’s marginal tax rate will remain 35% throughout this period. By how much does the interest tax shield increase the value of ECB?