Final answer:
The total deduction related to the new machine for 2015 under Section 179 is $125,000, assuming Maple Company has taxable income of $800,000 and elects to expense the maximum amount allowed without additional first-year depreciation or straight-line method.
Step-by-step explanation:
The student is asking about the deductions available for a new machine purchased by Maple Company under Section 179 of the Internal Revenue Code. Given that Maple acquired the machine at a cost of $125,000 on January 10, 2015, and has taxable income of $800,000, without taking additional first-year depreciation or electing the straight-line method, the total deductions related to the machine for 2015 would be the maximum amount allowed under § 179, which for 2015 was $500,000. Therefore, if the company elects to expense the maximum amount, the total deduction in 2015 would be the full cost of the machine, or $125,000. This is because Maple's taxable income is sufficient to cover the full expensing of the asset under Section 179. As a result, the correct answer to the student's question is 3) $125,000.