In 2016, Juanita is married and files a joint tax return with her husband. What is her tentative minimum tax in each of the following alternative circumstances? (Input all values as positive. Leave no answer blank. Enter zero if applicable.)

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a. Her AMT base is $108,000, all ordinary income

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b. Her AMT base is $370,000, all ordinary income.

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c. Her AMT base is $108,000, which includes $14,000 of qualified dividends.

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d. Her AMT base is $370,000, which includes $14,000 of qualified dividends.