Answer :
Foreign credit tax = $90,000
Explanation :
As per the data given in the question,
Bismarck corporation has pre credit U.S. tax = $210,000
Taxable income = $1,000,000
Foreign source = $200,000
Foreign source taxable income = $50,000
Paid taxes on foreign branch income = $80,000
Paid tax on passive category income = $10,000
Bismarck can have foreign credit tax of = $80,000 + $10,000
= $90,000
and amount of carry forward would be zero