amount of the deduction to $80\%$ of pre$-$tax income?

In September 2008, the IRS changed tax laws to allow banks to utilize the tax loss carryforwards of banks they acquire to shield up to 100% of their future income from taxes (prior law restricted the ability of acquirers to use these creditsy Suppose Fargo Bank acquired Covia Bank and with it acquired S74 billion in tax loss carryforwards If Fargo Bank was expected to generate taxable income of $10 billion per year In the future; and its tax rate was 300/07 what was the present value of these acquired tax loss carryforwards given a cost of capital of 8%? How would the present value change under current law which restricts the amount of the deduction to 80% of pre-tax income?