Calvin is married and files a joint tax return with his wife. Their AMT base is $400,000, all ordinary income. What is their tentative minimum tax? $66,720 O $ 60.180 $80,042 $ 108,042 Robert reports a regular tax liability of $27.000 and tentative minimum tax of $26,000. Given just this information, what is his alternative minimum tax liability for the year? O $0 $500 O $1,000 $26.000