Otto and Monica are married taxpayers who file a joint tax return. For the current tax year, they have AGI of $144,000. They have excess depreciation on real estate of $86,400, which must be added back to AGI to arrive at AMTI. The amount of their mortgage interest expense for the year was $28,800, and they made charitable contributions of $14,400. They have no other itemized deductions.

If Otto and Monica's taxable income for the current year is $100,800, determine the amount of their AMTI.