Use the following data to calculate Chiara’s AMT base in 2017.
Taxable income ..........................................    $148,000
Positive AMT adjustments .........................       73,000
Negative AMT adjustments .......................       55,000
Preferences ...............................................         30,000
Chiara will itemize deductions and will file as a single taxpayer. Taxable income is computed before the personal exemption amount, which is not included in the positive AMT adjustments amount above.