In 2015, Firm L purchased machinery costing $21,300 and elected to expense the entire cost under Section

Question:

In 2015, Firm L purchased machinery costing $21,300 and elected to expense the entire cost under Section 179. How much of the expense can Firm L deduct in each of the following cases?
a. Its taxable income before the deduction was $58,000.
b. Its taxable income before the deduction was $19,200.
c. Its net operating loss (NOL) before the deduction was $5,016.