Walmart paid out $252 million as debt interest. How much more tax would Walmart have paid if the firm had been entirely equity-financed? What would be the present value of Walmart's interest tax shield if the company planned to keep its borrowing permanently at this level? Assume an interest rate of 11% and a corporate tax rate of 35%.

$79.2 million more tax; $720 million present value tax shield

$88.2 million more tax; $801.8 million present value tax shield

$720 million more tax; $79.2 million present value tax shield

$801.8 million more tax; $88.2 million present value tax shield